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Re: [ATM] Betr.: Re: cutting a big piece of plate glass - Polarizer
Linear polarizers have a rotatable frame. Circular polarizers don't.
George Anderson
Montreal Canada
Clear skies and good health
Dominic-Luc Webb wrote:
> On Fri, 13 Jul 2007, Richard wrote:
>
>
>> Hi Dominic-Luc,
>>
>> Friday, July 13, 2007, 5:53:43 PM, you wrote:
>>
>> DLW> intensity of the light overall. Most polarizing filters for
>> DLW> cameras are also of this type.
>>
>> What would be the point of putting camera polarising filters in
>> rotatable mounts if they were circularly polarising?
>>
>> ARGH it's Friday the 13th!
>>
>
> We would have to ask the filter manufacturer. I could guess it
> would permit better light reduction with cheaper polarizers.
> I do know that there is no shortage of circular polarizers as
> camera accessories. I hoped to use camera polarizers for my
> research and I never found one that was purely 2 linear polarizers.
> Check Ebay, for instance, doing a search for "circular polarizer".
>
> Dominic
>
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