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Olympus OM-D E-M1 Mark II The second Micro Four Thirds camera that offers phase detect focusing so you can use Four Thirds DSLR lenses normally as well a Micro Four Thirds lenses.

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  #16  
Old 28th May 2017
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Re: C-AF disappointing

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Originally Posted by Tordan58 View Post
Here is a test I did demonstrating the OOF issue.

Single AF point, positioned so that it aims at the central tip of the central leaf
Shutter release prio OFF.
Camera locked focus immediately.
1/250s, F/4

The shots really show the issue.
One last check would be to try it with a different lens, then if thats the same I would take the body back under warranty and have it repaired.
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  #17  
Old 28th May 2017
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Re: C-AF disappointing

That test looks pretty conclusive to me, as Dave said probably worth trying it on another lens to see if it's different. but it's an interesting test I'm probably going to try it myself now as you've made me curious.
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  #18  
Old 28th May 2017
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Re: C-AF disappointing

Just tried the comparison and I can't see any difference both focus methods were spot on.


C-AF left. S-AF Right

[IMG][/IMG]
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  #19  
Old 28th May 2017
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Re: C-AF disappointing

I don't know the camera, but have read somewhere that it has the facility for focus adjustment like the older 4/3 cameras (e.g. E-5) is it possible that S-AF and C-AF use different methods of focusing and the lens/camera combo need fine tuning?
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  #20  
Old 28th May 2017
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Re: C-AF disappointing

OK so I tested using a focus chart. Distance to subject something like 2 meters. (On a side note this test also shows that the camera horizontal gauge is not calibrated however it does not really impact the test result as I aimed at the middle of the horizontal line, just where it intersects the vertical line).

S-AF: Pretty much spot on.






C-AF: Some spread is seen, within +/-1






C-AF+TR: Spread increases, offset -3




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Old 28th May 2017
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Re: C-AF disappointing

I was in the same doubt, and did a test using a tripod and a calibration Chart, testing all modes. Conclusiˇn: no difference. Can you share with us the exif of the flowers' pictures? That may help in finding something...
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  #22  
Old 28th May 2017
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Re: C-AF disappointing

Quote:
Originally Posted by IainMacD View Post
I don't know the camera, but have read somewhere that it has the facility for focus adjustment like the older 4/3 cameras (e.g. E-5) is it possible that S-AF and C-AF use different methods of focusing and the lens/camera combo need fine tuning?
Hi Ian,
This sound like a long shot to me... If that turned to be true it would be a bad thing.
/Tord
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Old 28th May 2017
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Re: C-AF disappointing

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Originally Posted by Tordan58 View Post
Hi Ian,
This sound like a long shot to me... If that turned to be true it would be a bad thing.
/Tord
Agreed - thought I'd left that behind when I ditched Canon!

In any case, if focus calibration were the issue then it would show in the S-AF shots.
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  #24  
Old 28th May 2017
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Re: C-AF disappointing

Hi Tordan,

Can you please do a total reset of the camera? I mean save your settings, go to factory reset and reload again.

In a number of occasions that fixed the problem.
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Old 28th May 2017
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Re: C-AF disappointing

Quote:
Originally Posted by c12402 View Post
I was in the same doubt, and did a test using a tripod and a calibration Chart, testing all modes. Conclusiˇn: no difference. Can you share with us the exif of the flowers' pictures? That may help in finding something...
Attached. I had to ZIP because of forum file size constraints. The ZIP contains two XML files with the EXIF.
Attached Files
File Type: zip Tulip EXIF.zip (18.2 KB, 8 views)
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Old 28th May 2017
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Re: C-AF disappointing

Quote:
Originally Posted by c12402 View Post
Hi Tordan,

Can you please do a total reset of the camera? I mean save your settings, go to factory reset and reload again.

In a number of occasions that fixed the problem.
Hi,

How do I do to save the settings, prior reset?
/Tord
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Re: C-AF disappointing

Using the free app Olympus viewer from Olympus. Go to menu-help-update camera. there you have three options for saving, reload, etc,..

Save first.

BTW, even if it has no effect in this test as it is static, I do recommend to set the reset lens parameter to off in all modes. I assume you also have read the local / global parameters logic in the camera, it's convenient to have in mind.
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Old 28th May 2017
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Re: C-AF disappointing

I'm assuming you've done the latest updates on lens & body then?
http://dl01.olympus-imaging.com/ww/u.../index02a.html
http://dl01.olympus-imaging.com/ww/u.../index02a.html

As found here. http://cs.olympus-imaging.jp/en/supp...tware/firm/e1/
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Old 28th May 2017
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Re: C-AF disappointing

"H fps (from 8 to max)"

My understanding is that for C-AF on the mkii you have to have L fps set. In high only the first frame is focussed. Still does not explain the oof flower though.
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Old 28th May 2017
GyRob GyRob is offline
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Re: C-AF disappointing

I'm finding that S-AF with 1 focus point is just about spot on every time but on C-AF with 1 focus point and shooting say a 20 frame burst on say a duck in flight you get some sharp then slightly soft then back to sharp again tracking +2 fast .
I'm SURE It may well be grabbing the wing tip at times or I move off the bird just a little but I am finding it is more often Me that is at fault .
I just did a static test tripod, gimbal 3200sec f4 iso 400 IS on
70 shot burst on a lamp post S-af 1 focus point all sharp but 3 a little soft IS on

same but C-AF about 5 were just a little soft IS on
same again but with IS off about 7 just a little soft
All silent electronic shutter Low setting .
When using more focus point's thing's can vary quite a lot but for birding (BIF ) you often have to and just risk the right point get the head .
My test's today have made me even more happy with the camera / lens Yes it could be a little better But we will always want that
Rob.
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