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RE: [OM] photographing polished metal- HELP!

Subject: RE: [OM] photographing polished metal- HELP!
From: "Harridge, Wayne" <Wayne.Harridge@xxxxxxxxxx>
Date: Sun, 28 May 2000 14:00:38 +0800
John wrote:

> 
> 
> Wayne wrote, of cross-polarisers and flash:
> > More bad news:  Reflections from an electrically conductive
> > surface are not polarised, so using the polarisers doesn't help.
> 
> I think I disagree. Surely the thing about metallic surfaces is that
> they have no polarising effect, so if the light is polarised in a
> particular plane when it hits the surface, it stays polarised
> afterwards.
> 
Correct.

> The converse is if you have something like water, which does polarise.
> You only need one polarising filter to stop reflections from water (if
> you're at the right angle) because the polarising effect of the water
> itself is doing the same job as the part of the cross-polariser on the
> flash.
> 
> Does that make sense?
> 

Yes.

So what is the benefit of using crossed polarisers on flash and lens when
photographing a metallic surface ?

Wayne Harridge
Ivanhoe, Victoria, Australia
http://www.geocities.com/wayneharridge/  

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