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Crop factor?

Posted: Fri Jun 06, 2025 2:51 pm
by neckbone
I am about to use vintage Zeiss Jena Flektogon and Biometar lenses, adapted with PL mount, on Arri AMIRA.
Considering that the sensor is not Full Frame, is there a crop factor on this camera? What will be the result using a ZEISS Jena MC Flektogon 35mm f2.4 lens?

Re: Crop factor?

Posted: Mon Jun 30, 2025 3:01 pm
by Simon Duschl
Bildschirmfoto 2025-06-30 um 14.59.55 (1).png
Hi, the crop factor depends on the used sensor size.
https://en.wikipedia.org/wiki/Crop_factor

The ARRI AMIRA is using a 16:9 aspect from the sensor. You can compare and calculate by using the diagonal length, but this is only an approximation, which would result in a crop factor of 1,43
More precise would be to distinguish between Horizontal (1,36) or Vertical (1,62) Crop Factor.