The Joy of Pixel Density

Started Jul 13, 2008 | Discussions thread
ZorSy Veteran Member • Posts: 3,482
Re: The Joy of Pixel Density

John Sheehy wrote:

The actual focal length at the "420mm" (EFL) end of the FZ50 is
88.5mm. The lens on the 400D was 22mm, So, I dialed in about 105mm
(EFL) on the FZ50, to approximate the same real focal length. My
estimation in dialing was pretty good, because when I used the
5.7:1.97 (2.89:1) ratio for scaling crops up and down, the subjects
were almost exactly the same size on screen.

Thanks, I understand now. So your test is comparision of (crop of)

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