Canon CN-E 50mm T1.3 L F Cine

Testing Lenses: Stopped-Down MTF Curves

For quite a while now we’ve been publishing our MTF curves. They’ve always been the same thing; at least ten copies of each lens, in 4 rotations, and measured at the widest aperture. The reasons for that are (to us) very straightforward. Our purpose in doing the tests is to establish reasonable…