Predictive AF Comparison Tests Lumix GH5, G85, Oly EM-1 Mark ll, and Nikon D500

Posted May. 14th, 2017 by Daniel J. Cox

Let’s get right to the point. This post is a Predictive AF comparison test between the Lumix GH5, G85, Olympus EM-1 Mark ll, and the Nikon D500. I’ve been shooting the new Lumix GH5 for almost two months, and Panasonic’s DFD autofocus is now producing equal to or better results than any camera I’ve shot to date. 

Predictive AF Comparison

This post is not an overall review of the GH5. I’m guessing I’ll do that after several more months of using the new camera. For now, this is all about Predictive AF. For those not familiar with the differences between Predictive AF and Single AF, Predictive AF is action—fast moving action—and the ability of a camera to capture those “glory pictures” we all desperately want in our portfolio. Up until now, the Micro Four Thirds world hasn’t had a camera that could perform on a truly professional level when it comes to Predictive AF. Hold on before you start screaming about the new Olympus EM-1 Mark ll having these abilities until you see the results below. With the GH5, we finally have truly professional, predictive AF proficiency. 

So that’s the intro. Now let me give you the details of what I’ve been up to that’s convinced me we’re now in a different world for Micro Four Thirds shooters.

A screenshot that shows how it looks in Mylio with star ratings. Note all the 3 stars that show perfect, razor sharp focus.

If you read this blog, you may have read other posts showcasing my “Speeding Pooch Test.”  A speeding pooch, preferably a lab or golden retriever, coming straight at the camera charging after a thrown ball, is one of the best ways to test the Predictive AF capabilities of any camera. The downside to this test is the difficulty of finding enough fast dogs to get lots and lots of opportunities to produce the tests. To solve this problem I decided to go after something there are plenty of, speeding cars.

Single point AF pointed at the middle part of the grill of each car. This is a screenshot of the image at 100% with no sharpening added.

For the test results I’m about to share, I placed myself beside a roadside where the speed limit is 75mph/120kmh. I shot just short of 10,000 frames between four different cameras: Lumix GH5, Lumix G85, Olympus Om-D EM-1 Mark ll, and the Nikon D500. On the two Lumix bodies, I used the Leica 100-400mm set at 300mm (600mm equivalent) as well as the NEW 100-300mm lens also set to 300mm. On the Olympus, I used the Olympus 300mm F/4, and on the Nikon I used the 80-400mm set to 400mm (600mm equivalent). All lenses were set to their respective focal lengths to be as close to identical as possible.

6K Photo Mode Video Capture Sample

Here’s a video I shot in 6K Photo Mode. This gives you an idea of fast these cars are coming at the camera. That in itself is interesting, but just to whet your appetite, for a future post about 6K Photo Mode, watch this video for focus accuracy. Keep in mind this is video shot at 30FPS at a very high shutter speed. Once you hit the play button, click the same button to stop the video at any particular spot and take a look a the focus of the GMC label on the grille. Unfortunately, there is no way to extract these files once you take them from the camera, so you have select the individual stills while the 6K Photo Mode file is still in the camera. Not a perfect solution but one we can live with until software catches up with this amazing camera technology. That is going to be unbelievable.

Star Rating System

I chose to use the following star rating system for AF quality:

3 Stars = Perfect focus, razor sharp

2 Stars = Acceptably sharp, most people viewing the image at 100% would think it’s useable

1 Star = Completely out of focus and un-useable

Apple’s Numbers spreadsheet with the number of images and percentages. Test 2 was just the GH5 and EM-1 to confirm what I had seen in the first test.

AF Menu Options

All cameras were set to AF-C and each was slightly customized via the AF settings in the menu. When I say “slightly customized” I mean slightly customized. This is very important since, in my opinion, AF settings should be simple and straightforward. Each camera’s AF setting was slightly changed to adjust the AF responsiveness. All were set to be most responsive since a car heading down the roadside is not going to have any subjects moving in front of it that might affect the AF misinterpreting the actual subject

Each camera has the ability to customize AF capabilities via the menu. In theory, this could be a good thing, but in practice, I feel there are too many options on all the cameras except the G85 and the Nikon D500. It’s my opinion AF should just work without any—or at least very little—customization. Canon started the idea of ultimate customization and the others have followed. When you point the AF sensor at the subject it should just follow it. Ideally, there should be no need for selecting erratic, constant, fast, short, etc. The GH5 has a pretty complicated customization process, but I chose to ignore most of it, opting for changing only the AF Custom Settgins> AF Sensitivity to +2. Below are details of similar changes to the other cameras.

  • Lumix GH5: Burst Rate = High, AF Custom Settings> AF Sensitivity +2, AF-C Focus/Release Priority set to Balance
  • Lumix G85:  Burst Rate = High,  Custom Settings>AF Sensitivity +2, AF-C Focus/Release Priority set to Focus
  • Olympus OM-D EM-1 Markll: Burst Rate = Low, C-AF  set to Loose +2
  • Nikon D500, Burst Rate = High, AF-C Priority Selection= Focus+Release

OK, so those were my settings and it’s here that I predict I’ll take the most heat. Why? Because there are other menu options and there will be those who will shout I didn’t do enough to explore them all. To that I say, be my guest and do it yourself. My options are a great place to start and were selected to put all cameras on as similar settings as possible so we could have an even playing field. Additionally, the settings I chose are simple and straightforward, which is how all AF systems should work. In other words, just give me great AF and I’ll be happy. Fine tuning each camera’s AF could make a difference, but the GH5’s keeper rate was so high, I’m thrilled with the results I’m getting with the basic settings. If you decide to choose one of the other cameras that didn’t do as well, you may want to do your own tests to see if digging through all the menu options can make your camera of choice more accurate than the GH5.

Download Image Samples

For those wanting to see the images for themselves and evaluate them for AF accuracy, I’ve uploaded several hundred samples from each camera to my Photo Shelter site. The links to those collections are below and you’re free to download any or all photos as long as they are kept on your own personal computer for your own personal use. Do not post these anywhere else without my written persimmon and keep in mind I retain all copyrights to the pictures I’m sharing. These galleries do not include the entire shoot from each camera. I may add more at a later day when I get somewhere with more bandwidth. I’m currently writing this from Croatia and I simply can’t get as many as 1000-1500 jpegs per camera up to my Photo Shelter account in a timely manner.

Download Lumix GH5 with 100-400mm lens samples
Password: gh5-100-400
1778 images

Download Lumix GH5 with 100-300mm lens samples
Password: gh5-100-300
455 images

Download Olympus OM-D EM-1 Mark ll with 300mm lens samples
Password: olyem-1markll300mm
1412 images

Download Nikon D500 with 80-400mm lens samples
Password: d500-80-400
416 images

Please Note: Unfortunately, PhotoShelter limits the number of photos you can download per zipped folder, so for the two galleries with 500+ images (GH5 with 100-400mm and Oly with 300mm), there are multiple zipped folders to download all of the images. Once in the gallery, click ‘Download’ in the upper right corner. Enter the password, and you will be taken to a screen that looks like this:

Select the size you want to download in the dropdown box, and then click ‘Continue.’ You will then be taken to a screen containing several links that looks like the screenshot below. Click on each link to download the corresponding zipped folder of images.

Panasonic Lumix Depth From Defocus Technology

So let’s end this conversation with a little discussion about Panasonic’s Depth From Defocus (DFD) technology. Based on these tests, Panasonic is close to my prediction of perfecting their revolutionary DFD AF system, something that virtually every magazine, website, forum, and the like have said cannot be done. Everybody, except me, has blogged, vlogged, chatted, and screamed, DFD, a Contrast Detection-based AF system will never equal the Phase Detection AF virtually every other serious camera manufacturer is using. I’ve said it time and time again, these naysayers sound just like the folks who were convinced digital would never replace film. Having the camera analyze autofocus based on the sensor itself, as DFD does, makes all the sense in the world. Phase Detection AF judges focus based on a separate AF sensor that is different from the image sensor thus making inaccuracies very possible.

It’s the Phase Detection system that Olympus, Nikon, and Canon use that requires they all have the ability for Micro Lens Adjustments. Micro Lens Adjustment, in the menu of the cameras I mentioned, allows the photographer to change the calibration of lens and camera that is either back or front focusing, a common problem with Phase Detection systems. The GH5 doesn’t have a Micro Lens Adjustment option since it’s never needed.  I experienced back focus issues for many years when I was shooting Nikon bodies. The issue raised its ugly head again this past February while shooting the new Olympus OM-D EM-1 Mark ll with the amazing Olympus 300m F/4. I knew the Olympus 300mm was much sharper than the images I was getting. I finally did a proper test and found the lens and camera were back focusing. A tweak of the Micro Lens Adjustment on the camera took care of the problem, but I’m happier the GH5 doesn’t need this option.


For those who want to see ALL the images for themselves, you can download the entire collection from my PhotoShelter account. I’ve broken them up into each camera’s own folder. These are for your own personal use and I retain all copyright to these images. Do not post them anywhere without my written permission. Go ahead and knock yourself out trying to second guess me. I think you’ll see for yourself this camera is the real deal, and to all those naysayers who are convinced Depth From Defocus is second rate technology to Phase Detection AF, this camera proves them wrong.

Speical thank you to Natural Exposures Explorer Fred Kurtz, a numbers man, who helped me get the numbers properly set up in Apple’s spreadsheet program.

Also, want to thank Marshall Lewis of Bozeman Camera for loaning me the Nikon D500 to test. If you want great service and reasonable prices give Marsha a call at +1 (406) 586-8300 or email:

Editorial Note:

Please note that I work with Panasonic as a Lumix Luminary. Some may think this will affect my integrity regarding these kinds of reviews. Nothing could be further from the truth. I worked with Nikon, unofficially, for nearly 35 years and I never received a dime. But I did so because I believed in their products. I now feel the same about Panasonic Lumix. Panasonic approached me to become a Luminary almost ten years after first purchasing one of their cameras, the Lumix GF1. Though Panasonic pays me a small stipend annually, no amount of money is worth the trust I’ve established with my readers and people who know me. I feel it’s important for my readers to know my connection to Panasonic so you can decide for yourself. 

Add Your Voice!
There are 55 comments on this post…
  1. NattyOn Jun. 30th, 2018

    Interesting. So what’s the verdict? Did the Olympus have the v2 firmware?

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jul. 9th, 2018


      No it did not have the newest firmware. Haven’t had a chance to rerun these tests. Thanks for the question. Will try and get this done later this month.

  2. PellicleOn Dec. 27th, 2017

    I was drawn in especially by your remark:
    “..and there will be those who will shout I didn’t do enough to explore them all. To that I say, be my guest and do it yourself. ”

    Exactly, most of who are professional complainers, never actually taking time to research in a rigorous manner and then publish coherent work as you have done.

    Well done Sir and it was a good read.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Dec. 27th, 2017

      Thanks Pellicle, glad you enjoyed the blog post. Actually, the folks who visit my Blog are typically very considerate and my comment, was actually directed at DPReview crowd who are always critical and never energetic enough to take the task on themselves. Back then I was posting some of my reviews on DPReview but I’v put that site behind me. Stop by anytime and I appreciate you adding your voice to the conversation.

  3. ZiggyOn Dec. 25th, 2017

    When the G85 is set to focus priority in the AF settings it doesn’t attempt predictive focus according to the manual.

  4. Daniel BrielmayerOn Nov. 8th, 2017

    Just reading this now but thought I would comment. First off I really do appreciate the effort! However, one thing about this test really bothers me and that is the amount of shots taken. In looking at your test, you had to take almost 2.5 times more photos with the Panasonic than you did the Nikon, just for a small increase in percentage. That’s a huge difference in the amount of frames. Personally, I believe you should use the same amount of shots for each camera. Cut is off at 1,000 shots and see where the percentages end up. I know this wasn’t your intention but it almost gives the appearance that you took so many photos with the Panasonic to up the percentage number for the shots.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Nov. 10th, 2017

      Daniel, point well taken. I just didn’t have the time to get all the same number of frames for each camera. That said, I agree with you that a similar number of frames for each camera would have been a better test. Will try harder to make that happen in future tests. Thanks for your input.

  5. Simon KnightOn Sep. 9th, 2017

    Hello Daniel, thank you for taking the time to publish the results of your autofocus test. I have recently purchased a Panasonic G80/81/85. I have been using AFS for general photography but yesterday I tried to use it coupled with a Lumix 100-300 Mk1 lens at an airshow. This proved to me that I don’t really have a clue what the optimum setting are for fast moving targets. More specifically I wonder if you know how the size of the auto focus rectangle changes the accuracy of AFC (or possibly AFF) mode as it seems that I can select either a large single focus box or create a custom set of nine smaller boxes that cover a similar area.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Sep. 9th, 2017

      Simon, I’ve never shot an airshow but airplanes are a pretty big target and should not be really difficult. Do I understand correctly that you were shooting flying aircraft with the G80’s AF switch set to AF-S or are you referring to the AF sensor to 1-Area? If the AF-S you mention relates to the AF Switch that you can set to AF-S or AF-C, then AF-S is definitely not the setting you should be using. For anything moving you want to use AF-C. The C stands for continues which means the lens is continually following the subject and focusing. AF-S focuses once and then is locked so the aircraft will fly out of focus. If you were using AF-S you’ll never get quality/well focused flight images unless you make the change to AF-C.

      As far as the AF sensor/rectangle is concerned, I would use one of these three settings. The 49 AF, Custom Multi or the 1-Area (in a fairly large size). I’ve found the Single in a large size does very well but if you plan to use a much larger AF target you might just as well go with the Custom Multi. At the distance an aircraft is flying I don’t think you’ll have any issues with AF accuracy grabbing the wrong target, such the tip of the closest wing. However, if you do, I would then switch AF over to the 1-Area and bring the size of the square down to almost as small as it can go, maybe one size larger than smallest, and TRY to keep the 1-Area Af sensor on the body of the aircraft. But I’m confident the Multi AF is going work just fine.

      The last thing to consider is the lens you’re using. The first generation 100-300m is a nice lens but it’s not even in the same league as the new 100-300 version 2 when it comes to moving objects. The new version is so much faster at focusing on things that are constantly moving and moving fast.

      Let me know if we’re on the same page as far as AF-S and AF-C is concerned. If you were shooting on AF-S I think you’ll be just fine with the 100-300mm version 1. Hope this helps.

    • Simon KnightOn Oct. 3rd, 2017

      Hi Daniel, Thanks for your reply. Yes I am using continuous auto focus modes and am still trying to understand the implications of various camera settings. I don’t visit many airshows so my investigations are more related to “Speeding Pooches”. I have an English Springer Spaniel, Charlie, and recently I have been filling memory cards with shots of him running towards me on our walks. My results have been mixed with quite a few shots with a blurred head and sharpish behind.

      I am trying to decide the optimum focus box size or custom group to use to best capture Charlie and as yet have not reached any firm conclusions. It seems that if the focus area is to large there is a risk of the focus latching onto the background. To small and it is difficult to keep the point on the target. I have installed a plugin for lightroom which shows the location of the focus point and many of my out of focus shots are the result of poor technique on my part. I am getting a feeling that the camera prefers to focus on green grass rather than dog fur but again this could be down to my poor technique. Also I am trying to stick with just using a single lens and am using the 12-35mm f2.8 mk 1 which I believe has a fast focus motor when compared with the Mk1 100-300. It is also easier to zoom out as my target approaches at speed. However, I have discovered that I enjoy the reach of the 100-300 so may upgrade to either the Mk2 version or maybe the Leica 100-400. I need to check which of them has the closest focusing.

      best wishes

      Talking of speed I estimate that Charlie runs at 11 mph which is roughly five meters per second or 1 c.m. in 1/500th of a second. However his ears and tail move at a higher rate and require faster shutter speeds in order to freeze motion. I mention this as my initial shots were taken at 1/500th and his head was often blurred which I now attribute to subject motion rather than failure of the auto focus.

  6. Simon HarrisonOn Jul. 18th, 2017

    Hi Daniel,

    Have you any experience of the predictive AF ability of the GH5 using a non DFD profiled lens such as the Oly 40-150mm f2.8 Pro? I’m currently weighing up my options for when the time comes to upgrade my GX8, and the GH5 (I’m a long time Panny user) and EM1 mk II are the two obvious candidates. However, most of my native m4/3 glass is now Olympus, so I’m trying to figure out how much of a predictive AF capability hit I’d take if I went with the GH5. Any info greatly appreciated. Simon.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jul. 18th, 2017

      That’s a great question Simon. Unfortunately I don’t know the answer. Would make a great test. Will try to make that happen this summer but it ma not be in time for you to make a decision.

    • Simon HarrisonOn Jul. 19th, 2017

      Thanks for the quick reply Daniel, most appreciated. Thankfully, I’m in no rush to replace my GX8 – maybe towards the end of this year, but no sooner. However, I’m only a hobbiest, and the price of both the GH5 and EM1 mk II are big, big investments for me so I want to get it right. Thanks again for the quick reply. Simon.

  7. John McCullyOn Jun. 27th, 2017

    Hello Daniel, many thanks for publishing the results of your test, much appreciated for sure. I am conducting tests comparing a Sony a6000/Sony FE 70-200mm F4 G OSS (because I have that combo) and my new Lumix G85/new 100-300 lens. I am using a Phantom 4 Pro Plus as the target operated by a colleague. My primary objective is to attempt to discover settings on the G85 that maximize performance.

    I note you report “On the two Lumix bodies, I used the Leica 100-400mm set at 300mm (600mm equivalent) as well as the NEW 100-300mm lens also set to 300mm.” however the line in the table G85 100-300 does not contain any data and I am wondering why. In as much as I have the G85/100-300 camera and lens and as yet not the GH5 that data is most important to me. Thanks for your comments on this. Cheers.


    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 29th, 2017

      Wow, what a great idea to use a drone as your AF target. Very clever. Regarding the empty line showing the G85 and 100-300mm. Good catch. I completely missed that and nobody else has mentioned it either. To be completely honest, it seems I accidentally combined the 100-400mm images in with the 100-300mm images, all shoot with the G85. That was not intentional. I’ll need to update that to sort that out. Thanks so much for catching this and bringing it to my attention. Always grateful for a thoughts, ideas, and general feedback.

  8. David GrimOn Jun. 20th, 2017

    Are there any other settings you recommend for still photography on the GH5? It would be nice to know as the menu can be intimidating compared to the G7 I had before. Goal is better color and sharpness on lenses like the 25 f1.4 that I know are capable of being sharp.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 23rd, 2017

      David, you mention you’re interested in settings to help improve color and sharpness of the 25mm F/1.4. Have you tried ;chanig any of the Phot Style options? Do you see issues with just the 25mm lens or do you have issues with other optics as well? In genearl you may want to checkout Photo Style options on pages 208-209 in the GH5 manual. You will also see options for shrpening your images. Let me know if you have further questipons.

  9. JonOn Jun. 5th, 2017

    You did a lot of work but there is more to do to untangle correlation from causation in interpreting your results. First, let’s clarify that the Olympus M1-II cross-type phase detection sensors are on the main sensor (not a separate one as with Nikon). Thus, if a sepecific Olympus lens back focuses xx amount on one M1-II body, it will have the identical issue on any M1-II body. The same is not true for the Nikon gear. Your 80-400mm lens which you know works great on another Nikon body indicates to me that you need to fine tune the focusing sensor to that lens on the D500 you used in the test. (I too have an excellently functioning 80-400mm lens with differently calibrated D500 and D7200 bodies. BTW, the optical quality of the Nikon 80-400mm is not inferior to the 100-400mm Pany lens as one commentator stated.) Second, the Olympus gear you used both have firmware updates involving AF. Third, your choice of the “loose” hold focus to focus on the Olympus body may be a problem; try the default zero. Fourth, I suggest that you set all cameras to the fastest common frame rate, single point C-AF, and set them to focus priority. Score the number of 3s and 2s per 5 second intervals. Then, using the same other settings, put the frame rates up to their max C-AF settings on the D500 and M1-II (try both the max for mechanical and electronic shutter); compare the scores per unit time. Fifth, the C-AF functionality of all cameras involves firmware algorithms. In my opinion, Nikon still has the best set but Olympus is dedicating a lot of engineering man hours to catching up. As an owner of the Nikon D500 and a couple of Olympus M1-II cameras, I like this competition.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 5th, 2017

      Thanks Jon

      I plan to run some more tests with all the cameras in July sometime. I’m currently in Europe for the next month so can’t get to new tests until a bit later. I appreciate the additional info.

  10. JonSnihOn Jun. 5th, 2017

    I had a dialogue with one photographer who can easily shoot action even with the E-M1I (a soccer game, rallye, objects moving towards the camera). The FW 3 and 4 were gamechangers. The E-M1II is even faster and more precise with new AF algorithms. See the review by David Thorpe.

    if some people can easily use the E-M1II AF capabilities and get 80-90% hit rate, you should be able to do it as well. GH5’s AF seems to be more versatile by default (I hope the GX9 will have this superb DFD2). The E-M1II’s AF is the opposite. The 5point or 9point focus area + Seq Low are recommended. An AF lock is the key (see table in the link, I think that +2 in your case is not convenient). You can also change the behaviour of AF acquisition (AF scanner) or limit the focus area (AF limiter). Good luck.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 5th, 2017

      As you may have read, I’m uncertain whether the Olympus had the updated firmware. I plan to check on that when I return from Europe and run more tests. Thaks for the additional info.

  11. GeorgeOn Jun. 5th, 2017

    I have to get your “written persimmon”? Wow! It must be the only such persimmon in the world! Probably even more sour than a regular persimmon if eaten before completely ripe.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 6th, 2017

      Sorry if you don’t like the restrictions, George. In the future do yourself and others all a favor and not waste your time with input on this blog unless of course, it’s constructive. I allow one warning on smart ass comments. Once that’s done you won’t ever see your name here again.

  12. LucieOn May. 30th, 2017

    First Dan, I would like to thank you for your extremely informative blog posts and tests.
    I own the Pana/leica 100-400mm and I am considering buying the Oly EM1 MKII. I currently have the EM10 MKII.

    One question I have about your test is the following: A car is a pretty big object to follow. Do you think you would have had similar resutls with birds, being that they are smaller and have more fine details than cars?

    I ask that question because I see a noticeable difference between the bird pics I get with the EM10 MKII + Pana/Leica 100-400 and the Canon 7D MKII + Canon 100-400 IS USM II. I want to go completely mirrorless but I am not convinced yet because of the IQ difference IMHO and when I read your blog, the difference between a bird with feathers and a car made me wonder if I can apply your results to my decision process.
    Thank you again for your excellent work and contribution to the photography world.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 31st, 2017


      First of all thanks so much for your kind comments. Getting a few compliments (slap on the back) now and again is certainly appreciated for all the work that goes into writing these blog posts. I’m not alway perfect but I certainly try to get the correct information out there. Just wanted to say thanks.

      Regarding your question. The fact that the car is much larger than a flying bird is helpful for two reasons. One, it’s a huge target that can easily be kept in the viewfinder. Birds not so easy. Secondly, the cars are very consistent in their speed and that speed is typically much fast than most birds are going to fly. The car, in my mind, was the best subject that would perform relatively consistently when testing four different cameras. I don’t really think there is going to be any benefit of seeing better details in images of birds. Whether there is more detail or less is not the point. The point of these tests was to see if the AF could keep up with a fast-moving subject and how consistently it could accurately keep focus.

      Unfortunately, the new Olympus performed much worse than all the other cameras but that may be due to lack of current firmware. I’m going to be rerunning these tests in July when I get back from Europe. I’m hopeful that the Olympus will improve dramatically. We shall see. Stay tuned and thanks for stopping by to join the conversation.

    • LucieOn May. 31st, 2017

      Thank you very much Dan for your speedy reply. I am indeed very surprised at the results of the EM1 MKII. I will try to wait for your next test in July,
      In the meantime, happy shooting.

  13. Portrait of Jay Murthy

    JayOn May. 28th, 2017


    I had the opportunity to run some tests on g85 and OMD em1 MII. I thought both the cameras did a great job on the speeding pooch test. Thought of sharing my experience. Here’s the link to my only blog.. thus far.


    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 28th, 2017

      Thaks for sharing this Jay. Always love to see others getting out to test their gear for themselvs. Nice job and really appreicate you adding your voice to the conversation.

    • RostaOn May. 29th, 2017

      Hi Jay,

      very nice testing. But I have a question to the stabilizer setting (also a question for Dan). Do you use normal stabilizer setting or setting for panning for such shoots like this running dog? Or are you even able to see a difference between these two options?

      Dan, thank you for your blog. It is really helpful to learn from somebody with such experience and results.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 29th, 2017

      My pleasure Rosta. Let me know if Jay gets back to you. Not sure he will necessarily see this.

    • Portrait of Jay Murthy

      JayOn May. 30th, 2017

      Thank you Rosta! for the IS setting, I used the auto mode as my generally sedate retriever goes just crazy when he sees a bouncing ball. I usually set my IS priority to lens IS particularly on the Olympus body and I think this helps especially for long focal lenths >300mm. For following flying birds, I set it to panning mode or auto. But from my experience/testing, I have not seen much of a difference in results using or not using a stabilizer at focal length of 100mm and shutter speed of 1/2000. I suspect, the difference may be negligible even at 300-400mm too at high shutter speeds. Love to hear Dan’s opinion on this.


    • Portrait of Jay Murthy

      JayOn May. 30th, 2017

      Thank you Dan. The speeding pooch test really tests the camera as well as the photographer. However, the technology today is so good, the limiting factor, in my case, is usually the photographer. Like I was telling someone, even if I rode a $10K carbon road bike , I would be easily beaten by a pro cyclist riding a $100 Huffy from Walmart.


  14. Portrait of Jane Scott Norris

    JaneOn May. 21st, 2017

    What a terrific article, Dan. As always you bring us lots of information, information I can trust. While I am sticking with Panasonic, not considering Olympus, I am nevertheless pleased to hear you consider the GH-5 to be a great performer. We have bought the GH-5 and really like it. I believe its AF capabilities are better than the GH-4. Glad to hear more about how well the G85 performs as this is an entry level option for some family members. THANKS!!

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 21st, 2017

      My pleasure Jane. Thaks for adding your voice to the conversaton.

  15. Scot PerryOn May. 17th, 2017

    I have a G85 and am happy with photo focus video AFC not so much. Was surprised you mentioned adjusting the focus on the Olympus as the phase detect is on the imaging chip I would not think this is necessary?

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 17th, 2017

      Scot, Not sure about the Phase Detection being on the sensor. From what I understand, Olympus combines both Phase and Contrast detection and they also give the option for Micro Focus Adjustment on the camera. Thankfully it works great when needed but not excited it’s necessary.

  16. HeathOn May. 17th, 2017

    The d500 and d5 with a 70-200 f2.8 E (the latest one) would make a marked difference, it’s one of the fastest if not fastest lenses out there for autofocus.

    Also I’ve seen a d500 track from the very left side of the frame to the very right and back again with 0 issues. No camera I’ve seen has done that

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 17th, 2017

      Heath, you may be right but I was trying to keep all the lenses as close to the same as possible for direct comparison purposes.

  17. Rich BallOn May. 15th, 2017

    Dan – Thanks for this post it gives me more to think about. I’ll defend the Nikon a little. The 80-400 is one of their older lenses if I’m correct. I would think the AF response is slower. This is a bit of an issue with both Canon and Nikon older lens designs .

    You were out in good bright light which is an advantage. Channeling my inner curmudgeon let me set up this shooting scenario. Since your a Montana guy – suppose your out on a hike in the autumn find two bull elk starting to fight over some females. A hard scene for any photographer to resist. It is also late in the afternoon and there is a heavy cloud cover. The light is pretty marginal but you are close enough to your car so that you aren’t too worried about getting out. Is the GH5 going to be able to find focus?

    Another scenario. This hike is in early summer. You find some pink lady slipper orchids. Hard to find. They are in prime condition and you have one of the very nice Panasonic macro lenses along. They are in the deep understory and again the light is marginal. Even though you don’t do flowers they are just too pretty to resist. Will the AF work? If it doesn’t have improvements been made to focus peaking so that it works in low light? With my Panasonic cameras focus peaking is useless in lower light situations. Also with macro lenses it starts the AF from infinity and often can’t find focus with subjects close to the minimum focus distance.

    I’m pretty sure my Canon 5D mkIV would be OK. I know my Panasonic cameras would struggle in both in both cases.

    In closing I realize the above are not ones that rely on the predictive capabilities of GH5. They are fairly realistic. I agree with your assessment that AF has been made too complicated. I remember reading an article a while ago that Canon had published a 160 page guide on using the AF for the EOS1DX mark II. 160 pages! Really guys!

    Thanks Rich Ball

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 15th, 2017

      Rich, the 80-400mm I used is the most current version as far as I know. I used it for a couple of years and was very happy with it’s AF capabilities. I guess it’s possible Nikon made have made some updates since the one I bought maybe five years ago.

      As far as the two scenarios you give, I’ve actually done both, or something very similar to both and had no issues focusing. There have been issues with Panasonic cameras in some situations where the focus is so far out, the camera won’t respond to bring the focus in. So far I’ve not experienced that with the GH5. I did have a problem in Botswana where the GH5 seemed to be doing the same thing but once I went from 49 Point AF to Single AF it had no issues at all.

  18. Dean SwartzOn May. 15th, 2017

    Dan, I just want to follow up on this AutoFocus thread. I had a chance to review about 400 images I took over the weekend of my son’s soccer game. While not as reliable as your “Speeding Pooch” testing, a field full of 16 crazed 11-year-old boys running around like maniacs is a reasonable alternative. You know how much trouble I have with “birds in flight” (no snide remarks, please). But, using the Olympus E-M1 Mk2 with the latest firmware and the 40-150mm f2.8 Pro in good light (shooting at f2.8, ISO 200, and 1/1,250-1/2,000 and “low speed silent mode” in C-AF) my 3-star rate was roughly 9 out of 10. This is by no means intended to call into question your significantly lower 3-star rate with the Oly E-M1 and 300mm Pro, but is just a different set of circumstances to consider. [Did you use the new E-M1 (1.2) and 300mm firmware (1.2)? Not sure if that would have made any difference, but they included improvements to the IS of both camera and lens.] As always, thanks for encouraging and facilitating this valuable discussion.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 15th, 2017

      Hmmmm………. Dean. Interesting question about the firmware. I’m not sure. I think it’s possible I don’t have the most current firmware. Sounds like there might be more tests coming if that’s the case. I have to say I was very surprised at the low numbers myself. I won’t be able to check until I get back from my two-month shoot in Europe. That will be around July 7th. Will follow this all up at that time. Thanks for the heads up.

  19. RikardOn May. 15th, 2017

    Hi Daniel
    Thank you for this post. I really needed this.
    I am using GH4 since it came and are disappointed by the tracking on that camera. Would be nice to see the comparison between GH4 and GH5 in this test also.
    Almost all focus on the GH5 are on its video capabilities.
    I am a still photographer.
    I am considering buying the GH5. After this test I am more convinced.
    I would like to also see an ISO comparison from you with the same cameras. Maybe also include a full frame.
    I read so many different “facts” about GH5 ISO capabilities.
    Thank you

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 15th, 2017

      Rikard, I do feel the GH5 offers substantial AF capabilities over the GH4 but that’s based more on gut feeling rather than any comparison tests. Not sure I will do any comparison between the cameras since I’m so pleased with the GH5, I’ll only be using my older GH4s for some video work. Regarding the ISO capabilities, again I have no actual comparisons on this but I’m very happy with the GH5. There is an improvement in higher ISOs with the GH5, how much? I’m not sure. All I know is that MFT cameras don’t compete with full frame Nikon, Canon and Sony cameras. However, with good noise reduction software, I use DXO Optics Pro 11 for noise reduction, I’m very happy with what I’m able to get out of my GH4 and even happier with the GH5.

      Here’s an image I recently shot in Namibia of the night sky that I used a slight amount of noise reduction on.

  20. Marko KoskenojaOn May. 14th, 2017

    Interesting results – technology marches forward with M43 cameras and lenses

  21. AndrewOn May. 14th, 2017

    Should be noted that according to the G85 manual (pg 116) it does not perform predictive focus when you you set release priority to focus, therefore under the context of your title it was not tested correctly.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 14th, 2017

      Andrew, you are correct. This may actually improve the G85’s results which were pretty good for an inexpensive camera already. I’ll rerun this test with the G85 later this summer when I get back from Europe. This minor change still keeps within my parameters of AF changes needing to be relatively simple and easy to figure out. Thanks for catching this.

    • TN ArgsOn Jun. 5th, 2017

      Hi Daniel, I wish to disagree with Andrew’s comment on May 14th, saying that your G85 test did not utilize predictive AF. Setting the G85 focus priority to Focus will only mean that the camera uses high standards of focus accuracy, even if it slows down the burst rate sometimes. Setting it to Release still uses the same AF mode but estimates focus i.e. more images will be slightly OOF but you will always get your exact burst rate bang-bang-bang.

      What you (Daniel) are calling ‘predictive AF’ is what the manual calls “Movement Prediction” (p91 in the G85 manual), and occurs at all times in AFC mode. The manual’s words “predicted focusing” on p116 is different: it means the camera is estimating focus (instead of confirming it, which takes more time).

      Hence Daniel’s G85 tests were performed with Movement Prediction (Panasonic talk) which is predictive AF (Canon talk).

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Jun. 5th, 2017

      Thaks for joining the conversation TN. More tests to come. Stay tuned.

  22. HolgerOn May. 14th, 2017

    “Unfortunately, there is no way to extract these files once you take them from the camera so you have select the individual stills while the 6K Photo Mode file is still in the camera. Not a perfect solution but one we can live with until software catches up with this amazing camera technology. That is going to be unbelievable.”

    I wrote a small Lightroom plugin which leverage ffmpeg to extract images from the stream. Supports both Batch mode as well as a mode to extract images based on frame number. You can find it here:

    Ffmpeg & Exiftool are part of Distribution so no additional installation required. If you want extract Hires jpegs you must install ImageMagick and set the path to it in PluginManager.

    Screenshot here (text in German, sorry)



    • Portrait of Daniel J. Cox

      Daniel J. CoxOn Sep. 14th, 2017

      Holger, thanks for this information. I look forward to trying your plugin. I’m hopeful with the release of Apple’s new High Sierra OS and the support of H.265 files things will improve fast.

  23. Dean SwartzOn May. 14th, 2017

    I know you were trying to use lenses designed for the respective cameras, hence the PL 100-400 with the GH5, and the Oly 300mm with the E-M1 Mk2, but compared to those great glass, we’re you saddling the D500 with inferior glass? The Nikkor 80-400 isn’t in the same league with the others. Just wondering if you tried out the Olympus 40-150mm f2.8 Pro with your comparison. As you have written before, the 40-150mm is a fantastic lens. Do you think being able to shoot wide open at f2.8 on the GH5 and E-M1 Mk2 would have made a significant difference? Perhaps not, because even the GH4 had better focus tracking than the E-M1 Mk1. Looks like Lumix still has the lead on Olympus. I was just surprised that the D500 did not do better than it did, but that may have been more the lens than the camera.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 14th, 2017

      I was also surprised the Nikon didn’t do better Dean but I used the 80-400mm for several years and was thrilled with its performance on much older Nikon bodies than the D500. Additionally, I felt it was important to have lenses that were all similar in focal length but also similar aperture range. That was the case except for the Olympus 300mm F/4. No test will ever be perfect but based on these tests and literally 40 years of shooting fast moving subjects, I can tell you, the GH5 is the real deal. On my recent trip to Botswana, I was getting photos of birds in flight, opportunities I’ve tried to get with my Nikons in the past, that 1-100 were ever in focus. With the GH5 those numbers were dramatically higher for similar situations. It’s hard to explain and part of the reason people have to know and trust the folks who are doing these kinds of tests. I’m hopeful I can be that person for my readers.

  24. Dean SwartzOn May. 14th, 2017

    You have, once again, provided the photo community with invaluable information with which to make equipment selection choices. I hope Panasonic and Olympus keep pushing each other to perfect their autofocus systems. Let’s hope that the next tweaks by Lumix and Oly get that 3-star rating capture rate closer to 100%. (Seems like Sony’s A9 has a sensor that will move things in that direction sooner than later.)

    What you have accomplished with this latest “research” is to make perfectly clear (tack sharp?) that MFT is a force with which to be reckoned. Way to go, Bro’.

    • Portrait of Daniel J. Cox

      Daniel J. CoxOn May. 14th, 2017

      Thanks, Dean. I recently updated this post with a video showing the speed of these cars coming towards the camera. It adds a great deal of additional perspective.

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