SURVEY - Do FT / mFT users know the difference from "full frame"? Replies wanted!!

Started Apr 26, 2013 | Discussions thread
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walkaround Senior Member • Posts: 2,551
Re: SURVEY - Do FT / mFT users know the difference from "full frame"? Replies wanted!!
2

Great Bustard wrote:

It's a shame that you can't understand that f/2.8 on mFT puts the same amount of light on the sensor as f/5.6 on FF for a given shutter speed...

This is wrong. There is a lot of magical thinking about equivalence on this forum.

And to that other guy, "F-stop" is not an "artificial construct". It is focal length divided by the aperture opening. It has nothing to do with format.

A 135 format camera with a 50mm lens that opens to a max diameter of 35mm requires the same exposure as a compact camera with a 14mm lens that opens to 10mm. Both are "f/1.4" lenses. They are equivalent. Any given part of the frame that is exposed will be the same density in both formats. The only difference between them is the size of the image circle projected.

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NRV
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