Reviving this thread for a dilema question.
Im buying into the Lee system planing to use it for all my formats from 35mm to 13X18cm, manual focus as well as auto focus in 35mm.
Logic says Cirkular but wallet says Linear.
So if using a tripod anyway will you consider the extra work in metering/setting aperture and shutterspeed and focussing to much of an extra hazle when using a Nikon F100?
In your case I see hardly a benefit of a circular polarizer, and no at all when you are metering handheld.