mikhailmatusov

Hmm, I haven't noticed that but I will check later today...

Well, I don't know what will happen. Visually all that happens is the number 120 changes to 220 on the back and the red dot moves from 120 position to 220 position on the inside. And the direction of the springs under the plate changes as well. As I've said I haven't tried loading the film yet and I don't really want to ruin a film either...

C220 has a separate knob for that!

Yes, but I can't see how it does it. There are two flat springs holding it, which in one position are parallel to the direction of the film and in another are perpendicular. I don't think this changes the pressure but perhaps when the springs are parallel to the movement of the film the plate can rock a little bit with the film movement. I am not sure if it makes sense though...

Hello gurus! I've recently purchased a heavily used C220 and being a total beginner in medium format I am not sure if it is all functional. I haven't yet tried loading a film in it. There is a rotating pressure plate on the back cover, which has two positions: one for 120 film and another for 220. I can turn it with no problem but I don't understand what it changes except for the text in the indicator window. Could someone please explain what is it supposed to do? Thanks.