light intensity and crop factor

Started Nov 23, 2012 | Discussions thread
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light intensity and crop factor
Nov 23, 2012

Simple question:
Suppose we have a prime like a 24mm F1.8 on a APS-C sized chip with crop factor 1.5.

How does this compare to a 36mm lens on FF or 35mm film camera?

Does it equal F2.7 or F1.8?

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