Best low light FF Canon DSLR

Started 3 months ago | Discussions thread
John Sheehy Forum Pro • Posts: 22,022
Re: Best low light FF Canon DSLR

Pocket Lint wrote:

It’s really hard to follow Johns logic.

I like to look at things as they are, and practically, which goes against the grain of common photographic wisdom.

But, larger photo sites are larger photo sites, there’s no way around beating the laws of nature, bigger photo site means less noise. Bottom line, full frame gives better noise performance compared to smaller sensors with smaller photo sites.

It's not the bottom line. You are crediting the wrong factors.

If you get a lot less noise and less diffraction with a larger sensor, it is because you are using a larger lens entrance pupil, or getting closer. The pixel size is not the core reason for the benefit of a FF with a large entrance pupil over a smaller sensor with a smaller entrance pupil.

A 3.1MP D30 APS-C with 50/2 will be much noisier than a 5Ds with an 85/2, despite having pixels with 6.5x the area.

Pixel size is one of the most highly overestimated contributors to image quality.

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