Best low light FF Canon DSLR

Started 3 months ago | Discussions thread
MarshallG
MarshallG Veteran Member • Posts: 7,223
Re: Best low light FF Canon DSLR

John Sheehy wrote:

MarshallG wrote:

J A C S wrote:

steks wrote:

Is there somewhere info to be found to figure out which camera is most light sensitive? I am thinking of buying a secondhand 5D/5Dii of 6D to use indoors with a 50mm prime. For other situations my 77D is more than enough for my use.

Of those you listed, the 6D, definitely. The newer ones do not offer any/much low light improvements.

Yup. The FF definitely beat the 80D but they're pretty similar to each other:

It comes down in real world to what optics you are using.

If you don't get the bigger lens with the larger entrance pupil with shallower DOF, for the same angle of view, the larger-sensor camera does not deliver, noise-wise, above base ISO.

It just so happens that DPReview "accidentally" tested the 5D4 at ISO 32000, which it usually doesn't do, but this is convenient for comparing in "equivalence" of angle of view, DOF, photon noise, and diffraction, which you would get with the same entrance pupil size and similar pricing in a lens. When you compare the 7D2 to the 5D4 that way (12800 vs 32000), noise is about the same in daylight mode, and the 7D2 is slightly cleaner in incandescent mode. This would carry over to cropping from the 5D4 vs using the 7D2, and in that case, the resolution ranking would flip, with the 7D2 then having the most resolution.

Larger sensor sizes do not give better high ISO performance by themselves; they absolutely require larger lenses to do the same angle of view, and get that extra light. There is no automatic magic in larger sensor size in isolation, except for using Av mode at base ISO, where you simply fill all the photosites on the larger center near capacity, regardless of whether you're using an f/0.9 lens or a pinhole cap.

It’s a little difficult to follow you sometimes, but are you saying that a FF camera is equal or worse than a crop camera if you crop the image you shot with the FF camera?   I understand that’s very meaningful in stuff like bird and maybe sports photography. If my most expensive lens was a 100-400 and I didn’t have 500-600mm glass (which is incredibly heavy and expensive), then I see your point.

There aren’t many small fast APS-C lenses, except Fuji ($$$). In Canon, I think every fast lens is a FF lens anyway.

I think that’s your point, and if so, it make sense to me.

 MarshallG's gear list:MarshallG's gear list
Canon EOS 5D Mark IV Canon EF 50mm f/1.4 USM Canon EF 85mm f/1.8 USM Canon EF 16-35mm F2.8L II USM Canon EF 70-200mm F2.8L IS II USM +2 more
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