This is my present set-up for field shooting it is evolving and changing I use an Olympus E-3 and a Sigma 150mm F:2.8 on a tripod , used a remote shutter release and 2 sec delay, (present camera Set-up http://fav.me/d37hwh8 most of the shots are stacked with sharpening and crop, no filters, Topaz, painting or other post work. The stack is done with Zerene Stacker I find this the best program for this kind of work.