Quote Originally Posted by Apugabug View Post
How much trouble is it to swap out the screen with the film holder and back compared to inserting flat film. Is it relatively simple to swap out?
It's not complex or difficult to swap a film back in and out, just a pain to do for each shot and without moving (slightly, depending on how secure the tripod) the camera on the tripod. Specific mechanics will depend on the camera. Using a Graflex press camera as an example, you typically have to move a sliding latch at both top and bottom, take the GG back off, replace it with the roll film back, then put the GG back on again. Less of an issue if you're using an accurate accessory viewfinder and don't need the GG back for each shot.

The Calumet style holders mimic the standard sheet film holder as far as inserting and extracting; so nothing to remove and set back down.