Good afternoon everybody
I wana ask, those lens with fixed f numbers, they are called fast lens? And they are supposed to be very sharp also?
Why? I thought "f" means aperture.
And these lens stay at f1.4, 1.8, 2.8 all the time? So it always have shallow depth of field?
I wana ask, those lens with fixed f numbers, they are called fast lens? And they are supposed to be very sharp also?
Why? I thought "f" means aperture.
And these lens stay at f1.4, 1.8, 2.8 all the time? So it always have shallow depth of field?