From: "benoit schillings" 
To: dmccarter{at}sympatico.ca, atm{at}shore.net
Reply-To: "benoit schillings" 


thank you so much Dave

-- benoit


>From: "Dave McCarter" 
>To: "benoit schillings"
,"ATM"
>
>Subject: Re: ATM Telescope making journal coma corrector...
>Date: Tue, 3 Jun 2003 21:34:13 -0400
>
> > I remembered an old issue of the telecope making journal which had the
> > design for 3 coma correctors made out of commercial lenses.
>
>That was David Shafer's How to make a Coma Corrector with Off the Shelf
>Optics in
>Telescope Making #45.
>
>Design #3 set two lenses inside focus by 41.4mm and used Melles Girot
>lenses #LMN 001
>and #LDX 167. Both are BK7. All measurements in mm.
>
>Surface    Radius    Thickness/spacing    Semi-dia
>1                -90.0        -3.0                        12.5
>2                -32.6        -2.0                        12.5
>3                -103.2      -3.2                        11.2
>4                103.2        -36.24                   11.2
>Image                                                        10
>
>
>Hope that helps.
>
>Dave
>

_________________________________________________________________
Protect your PC - get McAfee.com VirusScan Online
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

--- BBBS/NT v4.01 Flag-4