on 2004/09/18 11:09 AM, DACattani@xxxxxxx at DACattani@xxxxxxx wrote:
> I'm sure this is common knowledge, but I notice quite a bit of vignetting in
> my 21mm 2.0 with UV and polarizer filters attached. I've been thinking of
> getting a step-up ring such that I can keep the UV filter attached when I need
> the polarizer. Any suggestions? 55 to 67? 55 to 72?
>
> Up to now, I've just been swapping them.
>
> Also thinking of getting a thin polarizer to try to "thin down". Does anyone
> have experience with this?
I've been using a thin Olympus polarizer (=Hoya?) on a 21/3.5 and haven't
noticed a problem (I did with a normal Hota).
I thought polarizers absorbed UV, but haven't tested on a spectrometer...
Andrew
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