From: Dale J Martin <dale@massapoag.org>

Date: October 3, 2008 9:08:18 PM MDT

To: Astro IIDC IIDC <Astro_IIDC@yahoogroups.com>

Subject: Bahtinov Mask

Hi folks,

The best focusing tool if you have not following....

This the link to generate the mask...

A few nights ago I cut out the mask for an ED80 and
the test results were great! Tonight I printed one out on a jet ink
printer using 3M transparency film (CG3480 bought at Staples) and the
results were as good. Needless to say the film was much easier... no
cutting!

I used 2 epoxy to mount the film into a embroidery frame from Clover
(Art No. 8813) which fit the Orion ED80 scope.

This is an amazing tool!

Regards,

Dale