3dcheapskate opened this issue on Dec 01, 2014 ยท 26 posts
bagginsbill posted Wed, 03 December 2014 at 6:49 AM
Hi people. I'm not getting ebots - otherwise I would have come back sooner.
I never did such precise measurements - I only made a guess about the 1.414 based on "eyeballing" what a 90 degree view seemed to be and guessing that somebody mistakenly coded the diagonal of a square sensor or something like that.
Millighost's explanation (developers used a virtual 1-inch (25.4 mm) sensor instead of the SLR camera standard (36 mm)) makes the most sense to explain the facts - which are exactly as you demonstrated, 3dcheapskate.
I stand corrected.
I wonder what made them go through the logic of implying a photographic metric everybody knows (focal length in mm) and then using a completely unknown sensor size (1 inch) instead. Oh well - it is what it is.
I also confirmed the results myself, just to be sure. I concur that the stripe texture test with two images generated from 90-degree rotated views is the best way to demonstrated the consistent result from 12.7 mm.
Well done.
The Poser "crop factor" is 36mm/25.4mm which comes out to 1.41732283465, not the 1.414 that I had guessed.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)