Question about APS-H sensor size
I'd always thought that APS-H (e.g. 1D II, 1D III, 1D IV not 1DS series) was based on a 1.3x crop factor, either a 519mm or 548mm squared sensor. I don't know which is correct.
Lightroom 6 recently told me when browsing through focal lengths that the crop factor was only 1.26x to get the lens equivalency. Who is right? If Lightroom is wrong, any idea where they pulled this figure from?
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