>>3531855this is not true because if it were then I could handhold large format cameras in dark rooms at 1/500 sec at f/64 and get a shot
media size has nothing to do with the ability to gather light, look at cell phone cameras. it has everything to do with how close the photosites, those are the individual sensors on the actual wafer inside the camera, it has to do with how close they are to each other
say my Df has 16mp right, FF sensor. i've lot a lot more real estate to put those 16mp on. each individual photosite is a set distance apart from the next one, on the wafer. Now if I want to go to like, 1600 or 3200 ISO, those photosites push up their signal to noise ratio to make them more sensitive to light. Because they are microscopically spread so far apart, the noise generated from each one doesn't bleed over into the neighboring photosites as easy.
However on a 24mp crop sensor like on your 80d, those photosites are a lot closer to each other and at higher ISOs that noise generated at each photosite tends to bleed over into neighboring photosites moreso than it does on the 16mp Df or any 16mp FF sensor really.
Your 80d is still going to BTFO most compacts and cell phone cameras at high ISOs with comparative lenses, cell phones get their ability to gather light from software processing and fast prime lenses, not the ability of the sensor to gather light. Try to find some faster f1.8 or f1.4 lenses, an older camera with a fast lens is always going to shit on a newer camera with f2.8 zoom glass. If you don't believe me, this was taken on a 2005 Canon 5D with a 50 1.8 handheld and at 1600 ISO
