Quote Originally Posted by criza View Post
Another question evolved: I can use a step-up ring to mount a 77mm CPL filter on a 200mm lens, which has a 72mm thread, without any disadvantages? Would be nice to spare some money..
How much do you like hoods?
I can mount a 72mm CPL on my 67mm-threaded 70-300L with a 67-72mm step up ring.
But, I have to mount the hood first, then the step-up-ring and CPL. Dismantling, I have to unscrew the CPL and step-ring first, then take the hood off, and sometimes that's been a bit scary when i couldn't get the filter off easily (and couldn't get filter wrenches in there because of the hood).
In short, I gave up and bought a 67mm KSM CPL. It is still hard to adjust the CPL with the hood on, but at least I can get the hood on and off without touching the filters...