deepc0re
8-Mar-2007, 07:08
Is the center filter only needed when using bigger apertures on SA-XL 90mm f/5,6 and 72mm f/5,6 ?
If so, at what apertures is the center filter needed ? I guess the 72mm is a bit worse than the 90mm ? Does it also depend on the part of the image circle of the lens used (tilt,shift) ?
If so, at what apertures is the center filter needed ? I guess the 72mm is a bit worse than the 90mm ? Does it also depend on the part of the image circle of the lens used (tilt,shift) ?