light intensity and crop factor

Started Nov 23, 2012 | Discussions thread
JulesJ
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Re: light intensity and crop factor
In reply to didida do da do da do da, Nov 23, 2012

didida do da do da do da wrote:

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?

About 3.4 to 7.2 I think.

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