[Chaos-l] Telescope mirrors

[Jon Stewart-Taylor]

Hi all.  A couple of weeks ago, Jayme said:

> Aluminum Quartz, 91% reflective: $70.00
> Enhanced Aluminum, 95% reflective: $105.00
> Max "R", 98% reflective: $125.00

Dumb question: Are any of these coatings more durable than the others?

Without knowing that, my vote would be for either the 91% or 95%.   
These scopes are going to be primarily lunar/planetary scopes, where  
light gathering isn't as big an issue.  The fact that the 91% costs  
about 1/2 what the 98% costs is a factor as well.  $280.00 is easier  
to raise than $500.00.

Just my thoughts.

J.
-- 
Jon Stewart-Taylor: jcst at tripod.net
Chapel Hill Astronomy: http://rtpnet.org/chaos/
CHAOS Webmaster and Secretary: chaos at rtpnet.org

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