For F3.5 lens, the diffraction limited MTF at 35L/mm should be 0.91. Your curve shous a MTF range from 0.18-0.69 at 35L/mm, still good for a commerical lens.
Here is my comment
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• Thanks a lot. This is a Contax 645 55mm lens. -akiller- ♂ (0 bytes) () 01/31/2012 postreply 10:21:47