Hi,

Just to firstly note, I have not yet shot a piece of film on my new second hand norma, so go easy on my ignorance!

I have broken my ground glass, and am looking to replace, and I'm wondering why my ground glass is 5"x7" in total size, but the painted on framing rectangle is only 170x120 millimetres (smaller than 5"x7" by about 4-5mm on each side).

So I'm wondering.. what is the actual size of standard 5x7 film? And how does this translate to the ground glass? Would the image be larger than the framing rectangle dimensions mentioned above?