Is the telephoto effect of a crop sensor real?

Started Oct 16, 2011 | Discussions thread
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hzmeyer Senior Member • Posts: 1,111
Is the telephoto effect of a crop sensor real?

I know this has been discussed before, but is it really there? The actual subject size of the image falling on any sensor is the same for a given lens. You just get less coveage with a cropped sensor. The telephoto effect is achieved by enlarging the image. But why can't you just enlarge the image from a full frame sensor? My 5D Mark II, at 21 mega pixles, I would assume can be enlarged as much as a cropped sensor of lower total mega pixles to get the same "telephoto" effect.

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