D800 - high values of AF fine-tune...

Started Jul 15, 2012 | Discussions thread
Jarekn
Regular MemberPosts: 456
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Re: Discovery re: Fine-tune range
In reply to Jarekn, Aug 5, 2012

As per my other thread: http://forums.dpreview.com/forums/read.asp?forum=1021&message=42190788

I tested number of different lenses on my d3s:

50 mm 1.4, brand new 85 1.4, 24-70 2.8 and 70-200 2.8.

Number of test completely failed, few times I got msg: The result obtained from the camera and lens are not behaving as expected despite trying more testing also about the range being out of limit...

Here are some quick results:

50mm:
@ 1.4 @ 1.6m (reported distance to subject) = +18
@ 1.4 @ 1.0m = +12

@ 2.0 @ 1.0m = +15
@ 2.0 @ 1.6m = was unable to get results - tried few times.

24-70mm:
@ 2.8 @ 1.6m @ 50mm = -2
@ 2.8 @ 1.6m @ 24mm = +13
@ 2.8 @ 1.6m @ 70mm = unable to get results.

@ 2.8 @ 1m @ 50mm = +2
@ 2.8 @ 1.2m @ 24mm = +20
@ 2.8 @ 1m @ 70mm = unable to get results.

85 1.4:
@ 1.4 @ 1m = Unable to get any results
@ 1.4 @ 1.5m = +19
@ 1.4 @ 2m = unable to get results

70-200 2.8:
@ 2.8 @ 2.7m @ 200mm = +20
@ 2.8 @ 2.3m @ 105mm = +13
@ 2.8 @ 2.1m @ 70mm = +3

@ 4.5 @ 2.7m @ 200mm = unable to get results

Weird thing i noticed is that when i zoomed in/out on the 70-200 even though i didn't move the tripod, the distance to object was reported differently.

I should mention that shop did do some work previously on my camera - think they replaced the shutter aperture mechanism plus something else... Wonder if it's something they have messed up?

BTW my setup was really good I think, natural light, good shutter speed, solid tripod, all leveled etc...

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