Hi,

I've got a 90mm 6.8 Grandagon and I have a 77mm filter suite. I am thinking of a centre filter. I believe the centre filter will screw on to the 67mm front and steps up to 86mm. I will then not be able to screw on any of my 77mm filters on the front because of this - let alone the issue of filter stacking.

Has anyone got experience with putting a screw-on filter at the rear as well as having the centre filter at the front? Can one use 2 step up rings at the rear say, a 58-67 and a 67-77 ... ??

Is the image significantly compromised by using filters at the rear?

Thanks in advance,

Steve