ORIGINAL IMAGE
The proportions of a 35 mm camera file are not really a 3 1/2 x 5 or 5 x7 proportion, which are the typical print sizes made These two sizes are proportionally the same). They are actually 5 x 7.529 if you set one side as 5 ----- and 7 x 4.648 if you set one side as 7. Therefore, when we print a 5x7 or an 8x10 the sides of the image need to be cut. See below.