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

Started 6 months ago | Questions thread
Bob A L Veteran Member • Posts: 7,040
Re: So a f/1.8 on a 1" sensor would still gather more light than a f/3.5 on an APS-C?
5

Don't think you can say it gathers more light, but as far as exposure is concerned, f1.8 is going to work better in low light than f3.5. Sensor format does not affect exposure, it only sometimes allows you to use a higher iso to compensate for the slower f3.5 aperture. 400 iso on apsc might be as clean as 100 iso on 1". But I doubt that.

Looks like you would need to use iso 400 on the 3.5 lens with apsc compared to 100 iso on the 1" at f1.8. Also dof looks to be slightly deeper in favor of the 1" sensor at these aperture settings.  All in what you are looking for and which things are most important. The larger sensor will usually be expected to provide a bit more image quality at the same settings. But things start to vary when you start changing things like max available aperture. If light allows you to close down from max, the picture changes again.

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