Mike,
I?ve got the "proper" polarizer for this lens, the one made for it
by Tamron. It is a 43mm filter and is just a smidgen over 6mm
thick. Unlike other polarizers, it is not in a rotating mount.
Instead, it is in an ordinary filter mount, and changing its
orientation is done by rotating it, that is, screwing or
unscrewing it, in the filter holder. I don?t find this procedure
to be much of a problem. My modus operandi is just to view the
scene I intend to shoot through the filter, keeping the filter
holder upright while screwing the filter widdershins and deasil
until I get the desired effect, then drop it in the lens. It?s
actually easier than doing the same thing when using a rangefinder
camera.
I filed down a couple of Tiffen filters of a sort I like to use
occasionally -- 812 and enhancing -- to just over 6mm, and they
work fine in the rear filter holder. If you choose to do this, I
highly recommend removing the glass first. If a polarizer with
the double mount proves to be too thick, you might just remove the
glass and put it in an ordinary filter mount.
Walt
---------- Original Message ----------------------------------
From: Mike <watershed@xxxxxxxxxxxxxxx>
Reply-To: olympus@xxxxxxxxxxxxxxx
Date: Wed, 17 Sep 2003 23:23:05 -0700
>I'd like to get a polarizing filter that fits the drop in holder
>on the Tamron 300/2.8. I've been unable to find any information
>as to the thickness that can be accomodated. The holder appears
>to be designed for a 43mm filter and is about 7mm thick. But I
>have no idea of the max filter thickness that will fit. 49mm B+W
>filters I have are about 6mm thick, and the slim filters I have
>are between 3 and 4mm. Unfortunately filter thickness is not
>generally specified in the catalogues or on the web sites. So I'd
>like to hear what others use and what works. Specific brands and
>models would be helpful. I don't plan to skimp here so would
>like to get a decent MC filter.
>By the way, how much of a PITA is it to use a pol in the slip in
>holder?
>As if I could afford the big porthole that goes on the front. I
>found that chunk of glass for well north of $300
>
>mike
>
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