Quote:
Originally Posted by Emuhead
Ok, so coming back full circle on this.. can anyone with the formulas to work this out assist in determining once and for sure.. based on any given sensor (but mine is a Fuji XT2) which scope would capture light faster?
100mm f/5.5
120mm f/7
Id be eternally grateful if it could be worked out, and even more grateful if I could understand it afterwards.
Thanks  |
7^2/5.5^2=1.6198
So your calculations a few posts up were dead on
The reason I went more complicated with my previous post was to show WHY it’s the F/Ratio that determines photographic speed and not aperture. It can also prove that my 50mm F/1.4 is photographically 25x faster than the 120mm and 15.5x faster than the 100mm