Here is the problem:
I am on the second K5, I own 15,21,35Macro,70 Ltd. lenses and the 50-135 (and the 17-55 which I dont use because IMO its not worth it)
I have finetuned AF a lot back and forth with those lenses because I have had problems with AF. Now I am back to zero or max +/- 2 adjustment.
Short distance focus seems ok, not super accurate like my Nikon but not so bad.
The main problem starts when we have distances around 2meters and longer.
To find out if I am alone could maybe anybody here shoot a leaf lying on the grass from 1,2,3,5meters distance wide open with a focal length 35mm or longer?
Now I also have one theory: the focus thread on the Limited DA primes is very very short. The 2m "position" of the focus thread is very close to the 3m to the 5m to infinity. Turning the focus ring 1 degree will lead to a much bigger change in distance compared to other lenses from other brands I own.
So maybe this could cause a certain innaccurancy in focusing???
So maybe a lens with a longer focus thread could be focused more accurate?
I have the AF set on the AF button
Does anybody here know if it makes a difference if I set it to AF-S or to AF-C in this position. AF-S locks and stay in the same position, AF-C sometimes is focusing back and forth a little (so which position would be the right one???) (however the Canon 7D for example have the same tendancy, the Nikon D700 seems to "lock" better even in AFC position).
So any idea if AF-S should be more reliable for static subjects?
Medium distance is where I really have the problem.
Thanks for any ideas.