Re: [ATM] Long Focus Refractor

[Ken Hunter <atm_ken_hunter@yahoo.com>]

--- Michael Lindner <mikell@optonline.net> wrote:
> On Saturday 27 March 2004 07:31 pm, Ken Hunter
> wrote:
> > Richard wrote...
> >>
> >> Actually, with a refractor, it is not as bad as
> that.
> ...
> > This may be true for the difference in FOCUS
> POSITION
> > but an AXIAL ray diverted one degree will be
> displaced
> > 1.745 feet laterally on a 100 foot radius.
> 
> No, actually Richard is right, I was wrong. I'm
> thinking in reflective terms, 
> not refractive. The ray is only displaced while
> travelling through the glass, 

Yes, I was right and wrong at the same time! I too was
thinking reflective displacement of one degree at
first and as corrected by Richard privately and
yourself I hereby eat humble pie!

Though an AXIAL AXIAL ray diverted one degree WOULD be
displaced 1.745 feet laterally at a 100 foot radius.

Too bad that wasn't the problem, it's one of the few
math calculations I know how to make!

Ken Hunter

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