So a f/1.8 on a 1" sensor would still gather more light than a f/3.5 on an APS-C?

Started Sep 18, 2022 | Questions thread
Bill Ferris
Bill Ferris Forum Pro • Posts: 10,739
Re: So a f/1.8 on a 1" sensor would still gather more light than a f/3.5 on an APS-C?
1

yazcui wrote:

Just trying to get my bearings here. Does this mean the 1" would do better in low light?

Not necessarily. The relative crop factor of a 1-inch sensor in relationship to an APS-C sensor is 1.8x. An f/1.8 aperture on a 1-inch camera would be equivalent to an f/3.24 aperture on APS-C. That's a 1/3-stop difference in comparison with the f/3.5 lens you ask about. Yes, there's a difference but it's arguably insignificant.

In terms of exposure, the APS-C camera could potentially compensate for the 1-stop disadvantage in maximum aperture by using a slower shutter speed. If that's an available option, the APS-C body would gather more light and make images with less noise. If using a slower shutter speed isn't an option. The 1-inch sensor body would have a slight advantage in total light delivered to the sensor.

At this point, we'd need more detail about the photo being made to make a more complete evaluation of the potential of the two cameras.

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