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Forum: Pentax SLR Lens Discussion
11-26-2017, 11:05 PM
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So basically its like looking through two pipes.
Both are 50 cmm long. One is 10 cm wide and the other 20 cm.
You see more with 20 cm but they are the same length that is why focal length is not important.
I think the reason why people say you get a short telephoto or extra reach is because you dont have to crop much with an aps-c. That is filling the frame and getting rid of empty space as compared to ff.
Extra reach should mean more focal length. But they still say its the same focal length. that is where the confusion comes i guess.
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