>I sometimes (not too often) stack two filters on the 21/2 -- for
>instance, a polarizer and an enhancing filter or a polarizer and a
>graduated ND filter. Being a Zuikoholic with, naturally, a bunch
>of Zuikos, I have every filter in three sizes: 49, 55 and 72mm.
>So, to avoid vignetting when using two filters, I just use a 55-
>72mm step-up ring and use the 72mm filters on the 21/2 or the 35/2
>when I want to use more than one. A $10 solution, and you don't
>even need the more expensive thin filters.
>
>Walt Wayman
>
Something we can agree on Walt ;-)
I use a 49-62mm step up an a number of 62mm filters on a 21/3.5. Why 62mm?
'cos that's what I had lying around. I'm sure that a 49-55mm ring would
allow mounting the thickest 55mm polariser on a 21/3.5 without vignetting -
and you need 55mm filters anyway, right? Absolutely the cheapest solution.
AndrewF
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