Yakim Peled
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 p.10 #5 · Does your MkIII have AF issues? | |
dIggO wrote:
Don't know if this one has come along before but it's interesting.
http://www.wildlifeimagesbyles.net/Technique/1DIII_Guide/1diii_guide.html
dIggO
Thank you for the link.
1. It is indeed interesting.
2. It confirmed my thoughts. See the C.Fn III - 3 section.
Yakim Peled wrote:
rscheffler wrote:
Yakim Peled wrote:
Alistair101 wrote:
Yakim Peled wrote:
I have a question for all those who got nothing in focus. Did you set C.Fn III - 3 to 0? According to the manual it's suppose to prevent this phenomena.
I never felt like this worked for me. Yes the first shot in a burst was always very sharp but the remainder were hit and miss, usually miss - not by much but enough to make the images useless. Changing cfn III 3 from 0 to 1 and back, made very little difference.
Then it seems that this C.Fn is not working properly. IMHO this is unacceptable in such an expensive piece of equipment.
Happy shooting,
Yakim.
Yakim, I think you misunderstand the purpose for that custom function. It's not to prevent the AF from focusing inaccurately for whatever reason, either due to user or camera error in following a small moving subject or it refocusing on something else of equal or greater contrast, etc. It's designed to prevent the AF from racking back and forth and wasting a second or two trying to focus on an area with no contrast. Instead it's supposed to keep the focus at the last reliable focus lock until there is enough contrast to again find focus. A problem with this CF is if your lens is accidentally defocused by a large degree and you try to quickly grab a shot, the camera can't detect any contrast to focus on and does not attempt to focus, thus resulting in a missed opportunity.
My understanding of this is very straightforward: Do not release the shutter if nothing is in focus.
Happy shooting,
Yakim.
Page 26 of this thread.
Happy shooting,
Yakim.
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