Can someone please explain the term "100% crop"

Started Apr 7, 2013 | Discussions thread
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Can someone please explain the term "100% crop"
Apr 7, 2013

I look at one of the other posts that refers to a 10% crop of a DX image shot on a D800 using the new 80-400VRII and what I see in CNX2 is an area that represents about 10% of the original frame - even though the 'zoom' ratio in the 'birds eye' view says 100%!

It doesn't seem to have any relationship to the image's linear length or area.

So what does a 50% crop mean? I would have thought it meant 50% of the original image area.

Or does it mean you are looking at a lifesize image on the screen that you would see if printed at 200dpi (in which case it should be refered to as a 100% view NOT crop)?

Can someone please enlighten me as I see this used all the time on various forums yet on one seems to know what it means.

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Nikon D800
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