Posts Made By: Doug Tanaka

March 1, 2003 04:58 PM Forum: Equipment Talk

Filters for ETX

Posted By Doug Tanaka

I have used filters in an ETX90 and IMO the only filter that works well is the narrowband (UHC, Ultrablock, etc). A broadband filter like the Skyglow doesn't make much difference and there isn't enough aperture to use an OIII (overall image is too dark).

Doug Tanaka

March 2, 2003 06:47 AM Forum: Equipment Talk

Best Contrast Eyepieces

Posted By Doug Tanaka

Take a look at this article by Roland Cristen

http://voltaire.csun.edu/roland/coating.html

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Posts Made By: Doug Tanaka

Filters for ETX

Best Contrast Eyepieces

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