08-23-2018, 03:36 PM
(08-23-2018, 02:51 PM)obican Wrote: I like the idea of having a 50/1.2, especially since they're already releasing a good quality 50/1.8 anyway.Nitpicking:
Most people went for the 50/1.4 instead of the f/1.8 models because the former were made to higher standards, optics were better, AF was better etc. Since then the f/1.8 lenses have gotten a lot better. Sony/Zeiss 55/1.8 is a prime example of that. This Nikon 50/1.8 will probably be another example.
Why would you go for a 50/1.4 if the 50/1.8 is already good enough? For half stop faster aperture?
That's where 50/1.2 makes sense. It's a FULL STOP faster. That might be worth it over the f/1.8 model.
f2 to f1.4 is 1 stop.
f1.8 is 1/3rd of a stop faster than f2, so 2/3rd stop slower than f1.4.
F1.2 usually is 1/2 stop faster than f1.4, so f1.2 is more than 1 stop faster than f1.8.
1/2 stop scale:
f1, f1.2, f1.4, f1.7, f2
1/3 stop scale:
f1, f1.1, f1.3, f1.4, f1.6, f1.8, f2