davel33
Senior Member
This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
THE SKY IS NOT FALLING
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AF issues using adapted EF lenses / AF Shootout vs 6D2
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KyleSlamchez
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Somehow Leica (Panasonic?) figured out low-light focus acquisition on mirrorless, because my Leica Q will focus without hunting in near-darkness, with minimal "false positives." I love it for astrophotography, because it can quickly easily focus on individual stars.
Having said that, I never work with continuous af on the Leica. I don't really have a need for it, and I assume it wouldn't really work well anyway, as it has no phase detection.
I own cameras by all the major brands, including three full-frame Canon dslr's (but I have not tried the Canon EOS R yet), but I keep coming back to the Leica Q whenever possible, because it's just so damn reliable. Having said that, it only has a 28mm fixed lens and one card slot.
I say this not to criticize Canon--I adore Canon color science, lenses, and their professional service system--but to say there is hope. It sounds like they just need to sort out whatever Leica was able to sort out. Maybe Canon's 2019 "pro mirrorless" camera will be better.
All the same, I look forward to testing the Canon EOS R for myself as soon as I can get my hands on one.
Having said that, I never work with continuous af on the Leica. I don't really have a need for it, and I assume it wouldn't really work well anyway, as it has no phase detection.
I own cameras by all the major brands, including three full-frame Canon dslr's (but I have not tried the Canon EOS R yet), but I keep coming back to the Leica Q whenever possible, because it's just so damn reliable. Having said that, it only has a 28mm fixed lens and one card slot.
I say this not to criticize Canon--I adore Canon color science, lenses, and their professional service system--but to say there is hope. It sounds like they just need to sort out whatever Leica was able to sort out. Maybe Canon's 2019 "pro mirrorless" camera will be better.
All the same, I look forward to testing the Canon EOS R for myself as soon as I can get my hands on one.
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Ed Rizk
Senior Member
Agreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
If you shoot a lot of action, mirror less is still not for you.
I’ve heard that Sony has changed this with the new firmware. Have you updated yet?
Right but until it gets sorted, DSLRs won't be going anywhere, especially in pro kit bags.Agreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
If you shoot a lot of action, mirror less is still not for you.
This is why i think Canon were clear in their press release that EOS R isn't a DSLR replacement, it's an add-on.
Really? I am using an A7iii for action and I find it to be excellent. Granted I came from a 6d which was really not very good at all, but I have found af tracking to be pretty awesome with the A7iiiAgreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
If you shoot a lot of action, mirror less is still not for you.
I read in the Sony thread about the new firmware update. Haven’t had a chance to do it yet. I hope you’re right about addressing the stop down focusing.
Thanks for the reminder.
Geronimooo
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True, I'll keep my DSLR in my 'pro' bag for now. But I did two jobs this week with my R and am really happy with the results. More pics in focus (compared to my 5d Mark III) and I am starting to like the EVF.
Using native Sony lenses or adapted EF glass?Really? I am using an A7iii for action and I find it to be excellent. Granted I came from a 6d which was really not very good at all, but I have found af tracking to be pretty awesome with the A7iiiAgreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
If you shoot a lot of action, mirror less is still not for you.
Because this is about adapted legacy lens AF performance.
With the native RF lenses, you can expect much much better AF performance.
There you go, great point. I am using native glass on the SonyUsing native Sony lenses or adapted EF glass?Really? I am using an A7iii for action and I find it to be excellent. Granted I came from a 6d which was really not very good at all, but I have found af tracking to be pretty awesome with the A7iiiAgreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
If you shoot a lot of action, mirror less is still not for you.
Because this is about adapted legacy lens AF performance.
With the native RF lenses, you can expect much much better AF performance.
You do know that all canon DSLRs use a full PDAF off main sensor system and not a hybrid right? The hybrid systems are all basically new (released this decade) and is found in mirrorless systems...
The reason why DSLR PDAF systems are that good is because the pixels on them are huge compared to those found on imaging sensors.
Additionally many DSLRs have cross type and double cross toe AF points. On sensor PDAF points are not cross type. So depending on what you are tying to focus on there may be some issues.
All the reports I have read so far say that AF is stellar with adapted EF lenses. I wonder if you are an outlier or rather if your particular unit is an outlier.
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Big reason for this is the type of AF point. On sensor PDAF is essentially a single line type, either horizontal or vertical, but it cross type or double cross type. And such you do need to be careful with low contrast targets simply because there might not be enough detail crossing that single boundary between AF sub-pixels. With a high precision double cross type AF point it simply has more info to use. If you were to test out the regular type of AF on the DSLR then it’s peformance should also suffer. But of course since the off sensor AF module has far larger AF PDAF pixels it should still essentially do better in theory (note it gets less light than the on sensor pixels)
Same rules apply though. Simply focus something with more contrast on your subject when possible.
Hmmm.. I remember a representative (I think of canon) actually explained this. You might be able to google it. But he is right. You have two subpixels per pixel sight. So you need something to cross the divide between them so that the two subpixels have something to compare. Just how phase detect works.
Just reporting my findings, there is a video linked in my OP that seems to corroborate this as well. really doubt my unit is a lemon..
Nah... you don’t need 45 degrees. But you do need that line to cross the two sub/pixels at your focus point. You can easily test it. If you are having problems focusing on horizontal lines then rotate the camera 90 degrees and try again.
Ya... watched the video. And it would hardly call it conclusive. We all know AF systems tend to lock onto the nearest subject. So the framing for the “worse performing” lens was such that I am not surprised that it grabbed onto the fence at times. While for the best one which is the sigma the framing is such that the white dog is not only bigger but also closer to the camera than anything else. I would be more curious if he used expanded AF pint mode which would limit the AF to one area rather than such a wide area to let it roam around.
Heck if I were to shoot wide mode with the A7III I also wouldn’t trust the system to magically select the subject I intend since as I said before it should pick up what was nearest. It is more effective to place an AF point on what I want it to focus on while in AF-C and once it grabs on it sticks.
Generally the issue you are mentioning is definitely a global mirrorless AF problem. They are either horizontal or virticle type PDAF points. Many DSLRs have all cross type and some double cross type AF points which makes them perform better on low contrast targets. BUT, that is only up to a point. They need some feature to focus on.
The Nikon issue seems to be software.
this issue here about focusing on low contrast subjects is different.
Because they know what they are talking about. All mirrorless PDAF points including DPAF are only single line type AF points. DSLRs have cross and dual cross type AF points.
and are you focusing on a low contrast target? Cause that is what OP is complaining about. Both CDAF and PDAF methods requires some contrast. Take that Leica Q and try to focus on a smooth blank piece of paper with no shadows or highlights.
The A9 uses the same focusing method as the A7III, just faster. Give it perfectly horizontal lines or no contrast/feature for it to focus on and it will fail too. Do the same with a DSLR using a single orizontal type AF point and it will also fail just the same.Agreed. We all knew there would be compromises as well as offsetting benefits going mirror less. This is the best there is, with the possible exception of the A9.This has been known in the EOS M forum fo over a year now. Started with the M5, this is nothing new and is a very small problem.
THE SKY IS NOT FALLING
The video supplied by the OP is also BS since the framing is not the same. And the dog is even a little blown out (little contrast)
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