RE: [APML] Refractor recommendation

[Alan Voetsch <critter12952@yahoo.com>]

Hi Dave,

--- Dave Dockery <dave.dockery@zianet.com> wrote:
> The reducer/corrector sounds good. It would be nice
> to shoot faster than
> f/7 on the deep stuff.  What does the corrector do
> vs. the flattener?
 
The reducer widens the FOV and increases the speed of
the system from f/7 to f/5.6. It is excellent
optically. It reduces the normally 600mm f/l to 480mm.
The flattener is another matter. It increases the f/l
to 660mm, and the speed to f/7.8. I have not used it
photographically so I'll refrain from comments on that
aspect. Maybe Chris Cook or John Brodeaux can comment
further on this.

Alan 


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