Is a 300mm @21mp same as a 600mm@10mp?

Started Nov 14, 2008 | Discussions thread
Victor Engel Forum Pro • Posts: 18,485
Re: Is a 300mm @21mp same as a 600mm@10mp?

Andrew dB wrote:

No, the linear pixel density of the 1Ds3 is 15% higher than that of
the 1D3 which translates to a 300mm lens being effectively a 340mm
lens (probably closer to 345mm) when you crop the 1Ds3 to the same
pixel density. Where on Earth are you getting a 50% higher pixel
density from?

How can you crop the 1DS III to a different density? The crop still has the same density as the uncropped picture, given density as pixels/unit length, as you seem to be suggesting.

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