Re: [APML] Another intro

[Gene Horr <genehorr@texas.net>]

Jon Kolb wrote:
> 
> Tom,
> 
> > Has anyone heard this rumor about the C 9.25 also?  (I don't
> > have any hard
> > facts to back this up.)
> 
> I recall reading somewhere that the C9.25 has an f/3.3 primary and the
> secondary magnification is about 3, whereas the "normal" SCTs have an f/2
> primary and a secondary magnification of 5.  I may have the specific numbers
> wrong, but the C9.25 supposedly has a slower primary.  That could be the
> reason for the flatter field.

That's it.  The numbers may be off a little, but you're in the
ballpark.  

Gene Horr
genehorr@texas.net

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