Possibly dumb question. Knowing nothing about the science of lenses, and the math between formats, I wonder would the Super Takumar 50mm f1.4 for the Pentax Spotmatic be at all analogus to the Super Takumar 105mm f2.4 for the Pentax 6x7? In a general sense.

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2024-09-11 21:05

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2 小時內	Tim Sassoon timsassoont	Probably both Gaussian formula. But different sizes and image circles and back focus.
4 小時內	Puneet Sikand random_buzzword	It gets a little complicated, 35mm and 6x7 have different aspect ratios, it may or may not look exactly the same. 50mm and 105mm will have different angle of view, the depth of field will behave differently, but if you were to go and take a picture of a flat surface with both lenses at f8 or something like that you'd get a pretty similar look.