04-19-2013, 09:07 PM
If we are talking about strict equivalence, as best we can, then you DO have to multiply the f number.
Effective focal length, aperture, and ISO need to be multiplied. Shutter speed has to remain unchanged. Reducing the aperture means it would get darker, but you offset that by increasing the ISO too. Noise would be about the same since you have a bigger sensor.
Of course, if you don't care about strict equivalence, you can ignore that. But it doesn't stop it from being the case.
Effective focal length, aperture, and ISO need to be multiplied. Shutter speed has to remain unchanged. Reducing the aperture means it would get darker, but you offset that by increasing the ISO too. Noise would be about the same since you have a bigger sensor.
Of course, if you don't care about strict equivalence, you can ignore that. But it doesn't stop it from being the case.
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