09-02-2016, 07:52 PM
f1.4 x 1.6 = f2.24 FF equivalent. Not that fast compared to FF.
In my humble opinion a 1 kilo 20mm f1.4 on APS-C makes little sense. Especially if you find a lens with similar dimensions too heavy and bulky.
For APS-C you have the 20mm range covered (18mm in the 10-18mm, 20mm in the 17-55mm f2.8 and 18-135mm, 24mm on the 24-105mm f4 L). IS mostly makes up for the difference in speed.
So, what is it you actually want? Shallow DOF on the 750D? Look at the Samyang 16mm f2. "Only" 585 grams and 89mm, quite a bit less bulk. Or smaller, lighter FF UWA? I use the Voigtlander 20mm f3.5 SL II N myself.
In my humble opinion a 1 kilo 20mm f1.4 on APS-C makes little sense. Especially if you find a lens with similar dimensions too heavy and bulky.
For APS-C you have the 20mm range covered (18mm in the 10-18mm, 20mm in the 17-55mm f2.8 and 18-135mm, 24mm on the 24-105mm f4 L). IS mostly makes up for the difference in speed.
So, what is it you actually want? Shallow DOF on the 750D? Look at the Samyang 16mm f2. "Only" 585 grams and 89mm, quite a bit less bulk. Or smaller, lighter FF UWA? I use the Voigtlander 20mm f3.5 SL II N myself.