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

Started Jan 26, 2014 | Discussions thread
bobn2
bobn2 Forum Pro • Posts: 62,183
Re: A simple Yes or No.

Great Bustard wrote:

Now lets raise the sensor density to the same as the 4/3 camera. and what do we get. ?

The exact same thing, assuming, of course, that the higher density sensor is equally efficient.

See for real here

http://www.dpreview.com/forums/thread/3612689?page=7#forum-post-53009511

In this case the FF camera actually has a higher density sensor than the FT. The efficiency thing isn't so out of order, according to Kodak, the E-1 sensor has a 34% QE in the green, so the D800 doesn't have a stop on it, at least as far as the brighter bits go. Neither of them can match the density of the 1/2.4" sensor obviously (and being BSI, that has the highest efficiency).

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Bob

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