Can anyone with an RF 70-200 test to see if focus is off at 200mm f/2.8? After conducting some tests the focus is shifting most noticeable at 200mm (see link below for photos). I spoke with the camera store I purchased the lens from, and they confirmed the same issue with other copies of the lens they had in stock. It could be related to the camera, but I have absolutely no focusing issues with my other lenses. Note...these were taken on a tripod with shutter release, and single-point AF. In the linked folder you can see a robot image were the eye on the right is clearly out of focus using AF. I posted another image where I manually focused it.
I got the lens on Friday and tried tracking my dogs with it at 200mm using the single small autofocusing point and it could absolutely not nail focus. I don't have an EF 70-200mm f/2.8 any more to compare it to.
I was not expecting that it would have issues focusing on static subjects. Perhaps this is why Canon is rumored to be releasing a firmware update for the R/RP later this month?
Anyway, it at home, and I'll give it a try later when I am able to.
What aperture? Have you checked if the lens has focus shift (is the af fine @2.8?) Or is it actually the af? Then again, maybe the mf shot rules that out?
The images were taken at f/2.8. I spoke with Canon, and the lens should exhibit no lens shift.
AmbientMike wrote:
What aperture? Have you checked if the lens has focus shift (is the af fine @2.8?) Or is it actually the af? Then again, maybe the mf shot rules that out?
Makes sense that there might be a focusing issue. DPReview posted a sample gallery from the lens and the 200mm shots looked "bad". Wondering if not an AF issue causing that? Besides the heavy vignetting of course.
I personally haven't seen any shots from this lens that compare to the current EF models, especially the 70-200 f4 II.
Wondering if this lens also suffers from similar traits of the 70-300L, which is a good lens but never had that tack sharp clarity of the 70-200 lineup.
My shots below 200mm seemed extremely sharp. When I manually focused the lens it looks amazing. The focus is just not hitting at 200mm.
JohanEickmeyer wrote:
Makes sense that there might be a focusing issue. DPReview posted a sample gallery from the lens and the 200mm shots looked "bad". Wondering if not an AF issue causing that? Besides the heavy vignetting of course.
I personally haven't seen any shots from this lens that compare to the current EF models, especially the 70-200 f4 II.
Wondering if this lens also suffers from similar traits of the 70-300L, which is a good lens but never had that tack sharp clarity of the 70-200 lineup.
i dont think there is micro adjust when using mirror less lenses, i do have the lens and two r bodies will do some test. i looked at the dpreview shots at 200 and they all looked good. did u shoot a pure flat subject to test or just seeing it in the shots you have posted
EB-1 wrote:
Can you use the micro adjust to calibrate the AF at the 200 and 70 separately?
Most of the DPR photos in that gallery were stopped down. But I agree, I didn't see anything obviously off with the lens at 200mm.
Not exactly the same, but I recently had a loaner 90D. When used in live view and in very controlled situations with static subjects, it consistently back-focused very slightly. When viewing the images, they were always usable, but they weren't optimal. Manually focusing revealed that the lens was able to sharply focus at the desired point but AF was consistently slightly behind that point.
I just did some tests. I set up the focus chart with the intent of using it, but due to the rain and various other factors, I was limited to my kitchen, and I could not get everything lined up. If there is further need for testing I'm happy to do so, but I'm pretty pleased with the results.
Methodology:
On tripod, 2 second timer. Focused on background and then moved focus point back to target. Shots taken with AF single point "Small" and "Normal". Shutter priority was set to "Focus" and drive mode was single shot.
I placed the focus point over the left eye of the Rey lego figure. I also did a manual focus shot using max magnification on the eye. I can't really tell the difference between the two and the eye seems to be in perfect focus.
Please note that the focal plane is rotated around the x axis so it is further back in the top of the frame and further forward at the bottom of the frame due to not being able to get the tripod in to a good position to be at the same height as the objects being photographed.
There is no micro adjust for mirrorless. Thanks for running that test, and your picture looks like it hit focus. Could you do the same test at mfd? I have a new lens coming Friday, so I will report back if I’m having the same issue. The pictures I took were on a flat surface and a dimensional object.
jkochuni wrote:
There is no micro adjust for mirrorless.
Strange, my a7r4 does have AFMA and I believe it to be mirrorless. I think that the proper phrasing should be that there's no immediately obvious reason to have it, and Canon chose not to include it.
thats there in case u attach the le-4 with sony a mount lenses only
stanj wrote:
Strange, my a7r4 does have AFMA and I believe it to be mirrorless. I think that the proper phrasing should be that there's no immediately obvious reason to have it, and Canon chose not to include it.
jkochuni wrote:
There is no micro adjust for mirrorless.
stanj wrote:
Strange, my a7r4 does have AFMA and I believe it to be mirrorless. I think that the proper phrasing should be that there's no immediately obvious reason to have it, and Canon chose not to include it.
mehrdad sadat wrote:
thats there in case u attach the le-4 with sony a mount lenses only
Got it. It's still about the wording - to say that "it doesn't have it" is incorrect, misleading, and can lead to confusion later on.
I work at Kenmore Camera and sold Jason his lens(es). I tested 3 copies here at our store. Granted, it was only at 200mm and f2.8, but all three copies exhibited some level of front focusing at those settings. I used a tripod, 10 second timer, single shot AF and focusing on the center square of the lenscal. Images are from three different lenses and then a cropped in view of each. The #1 in front of 0 is clearly sharper than the #1 behind.
I tried an EF 70-200mm III with the EF-RF adapter and it seemed to be better at 200mm f2.8. I also tried the RF 70-200mm on the EOS RP and it had the same front focusing as the EOS R.
I called Canon's dealer support line to at least log the observations. Time will tell on the solution.
JimPatterson wrote:
I work at Kenmore Camera and sold Jason his lens(es). I tested 3 copies here at our store. Granted, it was only at 200mm and f2.8, but all three copies exhibited some level of front focusing at those settings. I used a tripod, 10 second timer, single shot AF and focusing on the center square of the lenscal. Images are from three different lenses and then a cropped in view of each. The #1 in front of 0 is clearly sharper than the #1 behind.
I tried an EF 70-200mm III with the EF-RF adapter and it seemed to be better at 200mm f2.8. I also tried the RF 70-200mm on the EOS RP and it had the same front focusing as the EOS R.
I called Canon's dealer support line to at least log the observations. Time will tell on the solution.
I got an RF 70-200 today and did some quick tests at 200mm, the minimum focus distance, f/2.8, and point auto-focus with the point at the center of the image. The camera reported achieving focus but the in-focus region was closer than focus point. The depth of field seemed narrower than expected. The RF 85 at f/1.2 had a much wider depth of field than the RF 70-200 at 200 and f/2.8. The problem diminished as I moved back from the minimum focus distance. This seems odd; at the minimum focus distance I would expect the camera to back focus but it is actually demonstrating front focus. Other images in this thread are showing the same.
