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Re: [ATM] Tough questions about Aperature Stops

Mike Carambat wrote:
> Playing around with an aperature stop for my Orion
> XT10 when viewing Mars. IT REALLY WORKS WELL! Doubling
> and blurryness are gone and I'm getting very, very
> nice edges and actually quite alot of surface detail
> (dark and light areas).

The blurriness and double images are the telltale signs of a primary 
mirror that hasn't cooled to the ambient air temperature.  Let the 
mirror cool and you should find that aperture stop actually hurts rather 
than helps.

Regards,
Gary

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