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Discussion in 'The Watering Hole' started by Jock Elliott, Jun 13, 2014.
Is it f/stop times crop factor?
Amin wrote a treatise about it a while ago. Also enlisted google to help out in the calculations
Thanks! Bookmarked it.
The really quick and dirty version is to multiply the lens aperture with the crop factor to get the f stop in fullframe equivalent.
For example Sony RX100, f1.8-4.9 crop factor 2.7 = f4.9-13 FF equivalent
It does get a bit messy with sensors not in the 3:2 form factor, but for a rough comparison it's certainly accurate enough, it's not like you can tell a huge difference between f10.5 and f11.5 DoF anyway.