A reminder for some memebers as to what the F stop is all about.

Started Jan 26, 2014 | Discussions thread
(unknown member) Veteran Member • Posts: 9,549
Both sides are sort of right

As far as I can tell, the amount light is relative. Light does not increase in density  or anything like that with a full frame, and 2.8=2.8 as far as shutter speed and iso goes.

The main difference with sensor size is that the larger the  sensor, the less you have to enlarge the image when developing it. That's why full frame (and medium and large format) tend to have more resolution even with the same megapixels. It was the same in film days. Increased megapixels  is sort of like using a finer film grain, but it's only going to get you so far.

Depth of field differences we all know and can all agree on.

DR and noise differences depend as much on current tech as anything else, so we see a D7100 outscoring Canon full frame sensors on DXO. Clearly though,  we can see the there is both a correlation between sensor size and these things, and sensor tech and these things, at least at this point in digital camera development.

All that said, the differences between these cameras is not worth arguing about (though I admit it can be fun sometimes).

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John Krumm
Juneau, AK

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