Two polarizers will reduce the amount of light reaching the lens, just as an ND filter would do. But I would be considered that the cross polarization might cause diffusion. One would have to alternately rotate each of the two filters to find a spot where they're at least somewhat compatible. Not a good thing. Paul On Nov 5, 2010, at 9:19 PM, Nick David Wright wrote:
> The first thing which comes to mind is that polarizers are much more > expensive than NDs. > > The second thing is they don't darken the entire scene do they? I > thought they change the color of the sky and remove reflections. > > On Fri, Nov 5, 2010 at 8:08 PM, Larry Colen <l...@red4est.com> wrote: >> Rather than a collection of neutral density filters, why not have two fairly >> large polarizers and a set of step down rings so that they can be used on a >> variety of lenses? >> >> Not only should you be able to get it fairly dark when they're cross >> polarized, but you'd have adjustability. >> >> -- >> Larry Colen l...@red4est.com sent from i4est >> >> >> >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > > > -- > ~Nick David Wright > http://www.nickdavidwright.net/ > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
