How to determine what aperture settings that gives the optimal performance of any lens ?
Example if i have a lens with f3.5 to 4.5 on each end, does it mean that the lens performance is at its best if i stop down 2 stops ?
same goes for prime lens example those with f1.8, does it mean its much sharper at 2.8 ?
Example if i have a lens with f3.5 to 4.5 on each end, does it mean that the lens performance is at its best if i stop down 2 stops ?
same goes for prime lens example those with f1.8, does it mean its much sharper at 2.8 ?