----- Original Message ----- 
From: "Herb Chong"
Subject: Re: wide angle filter question


> have to be careful. some rings move the filter forward.

Thats why the next size up. If it's a really wide, like a 17 or 20mm, she
could even go to an 82mm step up. At this point, she could probably stack a
couple of filters if need be, and use a lens hood.
All the stepping rings that I own do move the filter forward by a couple of
mm, or whatever the thickness of the ring is.

William Robb

>
>
> > You could circumvent the issue entirely by getting a 72-77 step up ring
> and
> > using 77mm accessories on the lens.
>
>
>
>


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