Originally posted by joele I'm still on my first without issue on the K10d, though I did have slight (not a real world problem for me) FF on the K100d..
I am also curious how obvious was the FF/BF??
You know Joel, what I am doing is kind of strange, yet essential to my achieving my final desired result. If the lens I am using cannot resolve perfectly what I am trying to accomplish, it cannot be used. I have "Never" had this problem before. Ever.
The circumstance is generally this. The position of the model might be for example leaning up against the "cyclo" i.e. solid rounded backdrop. I will be using a specific light that is very challenging for the AF sensor to identify, that being some hard pin light on the face to almost complete blackness on the neck, to light on the shoulder to the torso etc. I will focus on the "Eye" from a distance of lets say 2 meters. I will get an AF confirm and a second confirm to make sure it is in. I press the shutter, observe the image and where I focussed is out and where it is in focus is the torso..."NOT GOOD"..I mean "NOT GOOD". That happened twice and to rectify the problem, I had to USM at 1.0 pixels at 340 percent...
For landscapes and normal lighting conditions, it is fine. But this IS how I work. No ifs ands or buts. The 12-24 perfect the 16-45 perfect the 31, 40 and 70 perfect the 100 macro perfect. The "21" nada. If I manually focus, ignoring the AF confirm signal..It is OK.
Never had a problem with my lens of preference when with Canon, that being the 17-40L. So that is it in a nutshell. I told my guy at Pentax that if it can't be rectified I will have to stop using it..
Now how's that for an honest opinion coming from a sponsored Pentax photographer...
Ben