"William Robb" <[EMAIL PROTECTED]> wrote: >From: "P. J. Alling" > >> Assuming the COC which is not a hard and fast rule remains the same for >> the equivalent DOF on the other format. (I don't want to think about >> this, my brain hurts...) > >I don't really worry about that, I don't make prints large enough for it to >matter. >That and I think the entire COC thing is overblown anyway.
Pun intended? Seriously, I'm in complete agreement. There's enough obsessive-compulsive behavior involved in photography anyway. I just work on the principle that I'm going to have lees DOF when working in MF and a little more with APS-C digital. Yes, print size theoretically affects DOF, but standard viewing distance does too and that cancels it out as far as I can tell. My CoC/DoF rules of thumb: 1 - Go by what's on the lens' DOF scale 2 - If it's a critical job, keep things slightly *inside* the range on the lens' DOF scale 3 - The DOF you're going to get is pretty much set at the moment your three-dimensional scene is turned into two dimensions on your film or sensor, so get it right at that point 4 - "Go out and take some pictures" (Doug Brewer) -- Mark Roberts Photography and writing www.robertstech.com
