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
MarshallG Veteran Member • Posts: 8,927
Re: 2-stop advantage for f/1.8 on 1"-type sensor ???

PhotoTeach2 wrote:

yazcui wrote:

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

The 1"-type sensor has a (near) 2-stop advantage, (1.8-2 // 2.8 // 3.5-4) in exposure (aka light/unit-area).

However, it has a 1.2 stop disadvantage IF noise is a factor, (which can be likely in "low"-light).

(Note that noise is not a factor until it becomes noticeably-objectionable, AND then there is PP-Noise Reduction software to mitigate it.)

So I suggest the most practical answer is that the f/1.8 has a (near) 2-stop advantage over f/3.5.

Assumes the two sensors share the same design.

 MarshallG's gear list:MarshallG's gear list
Canon EOS R5 Canon EF 50mm F1.4 USM Canon EF 85mm F1.8 USM Canon EF 16-35mm F2.8L II USM Canon Extender EF 1.4x II +4 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow