How does film format effect image size?
All film formats vary in their proportions; EXAMPLE: 35mm is rectangular where medium formats can be square. Paper sizes are standard i.e. 8 x 10, 11 x 14, and so on. If I were to make a 35mm print on an 8 x 10 sheet the image would only be 6 1/2 x 10. If I were to make a square medium format print on that same 8 x 10 sheet the largest image I could make would be 8 x 8. If you wanted a 10 x 10 image the next paper size, which is 11 x 14, would be required. Part of a prints cost is based on the standard paper size needed to produce the image size required. Therefore, a 6 1/2 x 10 can be the same price as an 8 x 8 because the same paper size is used.
