Hi, sorry if this is the wrong area to post my question, but I thought large format photographers would have the most experience and expertise around ground glass focusing and shallow depth of field, on a view camera. ... So I've recently bought a Graflex Century Graphic, with a 6x9 back(I didn't go 5x4 or larger, because I like scanning film and using photoshop and don't have the funds to buy a larger scanner or upgrade my ramm, my pc already struggles with 6x9 colour film). It has a ysarex rodenstock 105mm 4.5 lens. When testing the camera out (I had to make a custom ground glass, I was testing that the film surface matched up on the 6x9 back and ground glass) I shot a roll of Ilford delta 100 of some static objects and finished off photographing my dog, so I didn't have 8 frames of boringness, when a few images, focused at different ranges, would tell me what I needed to know. Anyways, I got a beautiful shallow depth of field image of her, which the focus luckily landed on her eyes, and about 4 slightly out of focus images, which focused slightly in front and behind her eyes. This was due to the time between focusing and switching out ground glass and film back, she was sitting and swaying. The images of the static objects confirmed the focus is spot on, so this isn't an issue. My question is... Is there any techniques large format photographers use, to take shallow depth of field portraits with a view camera? I would like to photograph people with the camera, from about 4ft at f4.5, so focus will need to be spot on. Is it as simple as asking your subject to stay as still as possible and being as efficient as possible when switch ground class and film back out or will I need to close down the aperture? I plan to get an rb67 soon, so portraiture will be past onto that system, but I would still like to learn all the ins and outs of my graflex. Thanks, Gareth. P.S. I tried searching shallow depth of field portrait focusing with a ground glass, but I was getting search results about portrait orientation and shallow depth of field. I'm sorry if there is already a thread about this. I would appreciate a link, if there is.