I knew my monorail Horseman cameras had tripod mount gearing, but I never used it the way I did the other day. I focused the camera as I usually do, then while looking at GG I rolled the center tripod geared support back and forth and there it was! The whole DOF field easy seen, without refocusing. The zone of acceptable focus was visible, and when it went away.

Call me slow, or what, but it was a revelation to me.

Most cameras don't have this ability. Not the Sinar I have used, not my old Linhof, none of my flatbeds.

Which others do?