_valerian

5/30/2005

for the want of 40 more millimeters

Filed under: Photography — John @ 1:06 pm

“The rule of thumb is that the focal length of the lens must be equal to, or longer than, the diagonal of the negative, as measured in millimeters. If it is not, the lens might not be able to “see” all of the negative. For example, a 35mm negative requires a focal length of the lens that is at least 50mm. A 6×4.5 negative requires at least a 75mm lens. A 6×6 negative requires at least an 80mm lens. A 6×7 negative requires at least a 90mm lens.”

Looks like a 90mm lens is on my shopping list for next time, since those corners above show what you get with a normal 50mm lens.

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