For 35mm film astrophotography it had better use the larger opening of the
10" and larger SCT's or f/5.5 will cause serious vignetting. For CCD work
there is the Optec f/3.3 focal reducer which I hear gives good results.
Other than vignetting pretty bad at f/6.3 on 35mm film, I am very impressed
with the optical quality of my Meade Focal Reducer.

Chris Vedeler
http://www.isomedia.com/homes/cvedeler/space.htm
Tucson, AZ

Tim deBortoli wrote:

> I recently saw a Focal Reducer made by Apogee for SCT's. It was a f/5.5
> reducer.
>
> Has anyone used/owned one? Are they good quality compared with
> Meade/Celestron?
>
> TIA.
>
> Tim deBortoli
> Elliot Lake, Ontario

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