Eyepiece heater question

From: Joe S. (nobody_at_nowhere.net)
Date: 11/27/04 

Date: Sat, 27 Nov 2004 18:58:30 -0500

I am preparing to buy a Kendrick heater system and have some questions. I
have two scopes -- ETX-90 and 8-inch Dob.

I'm planning to buy the standard controller, a heater for the Autostar
controller hand paddle for my ETX scope, and one or more eyepiece heaters.

Eyepiece heaters:
What do I do when I change eyepieces? Pull the heater off the eyepiece
being replaced and wrap it around the eyepiece I am sticking into the scope?
Or, should I get 2-3 eyepiece heaters and put one on each eyepiece, even
when the eyepiece is not inserted into the scope?

ETX-90:
I have a dew shield on the ETX-90 and have never had a problem with dew
forming on the main lens -- dew does form on the finder scope and the
eyepiece -- do I really need a heater to wrap around the end of the scope
where the main lens is located?

For the Dob:
Do I really need a heater for the mirror in the Dob? I thought I was
supposed to let the mirror cool down before using it -- which is why I have
a fan on my mirror -- I have never had a problem with dew forming on the
primary mirror. The dew forms on the eyepieces, finder scope, and Telrad.

Thanks. 

-- 
-----
Joe S.

Relevant Pages

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  • Re: Eyepiece heater question
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