|About Aspect Ratio
My primary camera is a 3:2 aspect ratio, the same as a 35mm film camera (24x36mm).
I usually compose my images using the full frame so cropping will cut out some subject matter. This format yields full frame prints that are 4x6, 8x12, 24x36, etc., without cropping the original image. An image that is printed to 8x10 will loose about 17% of the image on the long side. An 8x12 can be reduced to 10 inches on the long side, but in order to keep the same aspect ratio, the short side will be reduced to just over 6.5 inches instead of 8 inches. A 5x7 with a 3:2 aspect ratio, un-cropped, will be about 4.6 inches on the short side to use the full frame at 7 inches on the long side.