I like shot glasses too.
I think for filters that the flatness is critical.
tOM
On Monday, August 26, 2002 at 19:46, plp@xxxxxxxx <olympus@xxxxxxxxxxxxxxx>
wrote re "Re: [OM] Filter recommendations for" saying:
> >Aside from vignetting and obvious build problems (e.g., cheap
> >plastic), what differentiates, say, a Lee filter from a Heliopan
> >filter from a Cokin system filter?
>
> As someone else posted, only Heliopan and B+W use Schott glass,
> which is held in the highest regard. And if the quality of the
> glass is not important to you, then why not just buy the cheapest
> Sigma, et all lenses? Also, only Heliopan and B+W use brass in
> the ring. All other makes, to my knowledge, use aluminum, which
> can stick (preventing easy removal). Slim mounts will eliminate
> all but the nastiest vignetting, and are usable on 21mm and up
> (don't know about 18mm and below). Hoya is good, but I happen to
> like the Schott glass, so I stick with Heliopan and B+W. Finally,
> all of Heliopan's current production is of the slim mount variety
> (except for certain polarizers), while B+W still makes many
> filters in the 8mm (non-slim) size.
>
> Pete
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tOM Trottier, ICQ:57647974 http://abacurial.com
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