Last updated: 31 August 2008

Subject:	ETX-125 Hartman Mask Pattern
Sent:	Saturday, August 30, 2008 07:42:04
From:	Tom McKechnie (tjmck@mts.net)
In my current move toward astrophotography, I found a need to create a
Hartman Mask.  Paul Russell [1ponders], of the Iceinspace forums
(Austraila) published an excellent article on how to draw the pattern
(Secret of the Hartmann Mask... Revealed!,
http://www.iceinspace.com.au/index.php?id=63,187,0,0,1,0).  I drew up
the pattern with the specifics of the ETX-125 and after obtaining Paul's
permission would like to share the drawings.  The PDF will need to be
scaled through the print scale function to obtain the correct dimension
- a dimension is include to allow this.  The DXF CAD output file
(zipped) should print 1:1.
Tom McKechnie

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Copyright ©2008 Michael L. Weasner / etx@me.com
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URL = http://www.weasner.com/etx/astrophotography/2008/hartmann_mask.html