AW: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-20 Thread keller.schaefer
erstag, 20. November 2003 20:07 An: [EMAIL PROTECTED] Betreff: RE: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?) Why not buy the safe glass etching cream sold in hobby stores everywhere? Try looking the stuff up for yourselves. Hint: Go to Google. Type "et

Re: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-20 Thread Dr E D F Williams
' Updated: August 15, 2003 "Oh my God! They've killed Teddy!" - Original Message - From: "mike.wilson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 20, 2003 5:49 PM Subject: Re: Making your own (WAS Re: Anybody know where to ge

Re: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-20 Thread mike.wilson
Hi, Fred wrote: > > If you have a piece of glass of the right shape and thickness, it > > would be easy to "matte" one side with a solution of sodium > > hydroxide. Some experimentation would be needed to get > > concentration and times. > > Gee, I don't think that NaOH will do anything to glas

Re: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-20 Thread Fred
> hydofluoric acid Oops. Make that "hydrofluoric". Fred, K1FW

Re: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-19 Thread Paul Eriksson
Fred wrote: Gee, I don't think that NaOH will do anything to glass. I think that, to etch glass, you need hydofluoric acid (HF). Fred, K1FW NaOH definately etches glass, especially if you heat it Paul (Chemist know-it-all) _ Say “

Re: Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-19 Thread Fred
> If you have a piece of glass of the right shape and thickness, it > would be easy to "matte" one side with a solution of sodium > hydroxide. Some experimentation would be needed to get > concentration and times. Gee, I don't think that NaOH will do anything to glass. I think that, to etch glas

Making your own (WAS Re: Anybody know where to get an SD-11 focusing screen?)

2003-11-19 Thread mike.wilson
Hi, Don wrote: > Has anyone on the list tried to make a screen? I did the other day -- for a > non-Pentax piece of equipment. I used a piece of glass from a 6x6 > anti-Newton Ring slide mount. It worked very well. The glass is very clear > but has very fine surface 'etching'. > > I guess there a