Quote Originally Posted by ChristopherCoy View Post
The Koroll takes 120 and it shoots 3x4.5cm images. It is vertically 4.5cm. If it were a full frame it would be 6x6, and half of six is three. So if I put the number in the left window first then in the second window, I would get a 6x4.5 frame.

At least that's what I'm thinking...
I guess you think wrong.

127 is approx 4.5cm vertically, I've just processed 4 films today - so just checked, the previous 127 films I processed were fresh from a Brownie 127 in the early-mid 1960's while at school. If those photo's are of a 127 camera you're thunmb etc is in proportion but that's not the case for a 120 camera.