RE: [APML] Celestron vs. Meade

[Philip Perkins <philip@astrocruise.com>]

Dale,

Gene and some others may want to correct this, but I think that's 
essentially right - the Newt typically has the smallest central obstruction 
of any reflector, and only one curved surface which is easy to figure to 
high accuracy (unlike an RC).  The only other surface is flat which is 
easiest of all to figure to high accuracy.  Collimation is critical in any 
reflecting telescope but it is less critical in the case of a Newt than an 
RC.  Bobby can talk about the potential stepladder problem (if it is a 
problem).

Regards
--Philip

At 17:23 13/02/03 -0800, you wrote:
>Thanks, the newtonian recommendation is interesting. I didn't know they were
>that much better for planets. Is this due to the smaller central obstruction
>and fewer glass surfaces? The problem is that I would like to avoid having
>to buy a new pier for the 900 (or a big stepladder)
>Dale
>
>
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Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com

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