Re: AN (Anti-Newton) glass question

In article <fru40n$ece$1@[EMAIL PROTECTED]
>,
 tls@[EMAIL PROTECTED]
 (Thor Lancelot Simon) wrote:

> In article
<internetphobic-293A06.22372719032008@[EMAIL PROTECTED]
>,
> ____  <internetphobic@[EMAIL PROTECTED]
> wrote:
> >
> >Ok for you, I just pulled my Omega 10x10 carrier out of the enlarger 
> >and it has two sheets of standard optical glass but not AN. To my 
> >knowledge AN appears with a Matte surface unlike standard optical grade

> >glass. It (AN) will look less than perfectly clear. Imop & Perhaps 
> >Richard K. can corroborate AN is only needed with a Condenser housing,
I 
> >have an Omega diffused Halogen one of three known to exist.
> 
> No.  Under some conditions -- atmospheric and of the negative -- you'll
> see Newton rings with this glass carrier.  I know because I have one.
> 
> To make one of my negatives printable I had to replace the top glass in
> my 10x10 Omega carrier with AN glass and the bottom glass with a piece
> of anti-reflective coated glass from a frame shop.  With that done, the
> problem was considerably lessened, though not eliminated entirely.
> 
> The best solution is a tension carrier like the pin-register carriers
> Fotar used to make for their enlargers -- actually the only 8x10"
> tension carriers I've ever seen.  In 4x5" the Beseler Negaflat, of
> course, was fairly common.

Is your 10 x10 the dichroic lamp house or a condenser? The Dichroic is a  
1,000 watt quartz halogen source. My diffused halogen is half that.

-- 
Reality is a picture perfected and never looking back.