From: "Dave McCarter" 
To: "benoit schillings" ,
"ATM" 
Reply-To: "Dave McCarter" 


> 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

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