Re: [APML] 500mm mirror lens as a guidescope?

[Christopher Go <christone@pacific.net.ph>]

I have one of these scopes and I would definitely NOT use it as a 
guidescope. Mirror shift of this scope is crazy!  Even at prime 
focus!  Your better off getting a refractor from Apogee with focus lock and 
guide rings attached to the scope for the mounting rings.

I tried even to use this scope piggybacked a years ago.  It couldn't keep 
focus particularly at the Zenith!

Regards,

Chris

At 10:57 PM 9/2/03 -0400, you wrote:
>While messing around with getting my B&W quickcam autoguider working and
>starting to worry about focuser flexure on my el-cheepo guidescope I
>started wondering (dangerous habit)...
>For widefield shots with a 35mm camera (50mm lens or less) would a
>guidescope with a 500mm focal length be sufficient?
>The 500mm f/8 mirror lens I have is very lightweight and has no
>detectable barrel flexure. The effective aperture is only 62mm but that
>is only a touch smaller than my 70mm f/10 scope that I use for manual
>guiding.
>Any thoughts from those in the know?
>
>George Anderson
>Montreal Canada
>
>Clear skies and good health
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Christopher and Vicky Go
Christone Industries
Manufacturer and Exporter of Quality Fossil Stone and Wrought Iron Furniture
Cebu, Philippines
http://www.christone.net
astropage: http://astro.christone.net 

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