> I spent a lot of time trying to collimate on stars. Results: Unimpressive.
> Reason: I could never seem to get seeing good enough to collimate at high
> magnification.

Please, has anyone tried to collimate by means of a Hartmann mask, combined
with e.g. a
Ronchi Screen ?

Suggested links :

Ronchi Screens should allow perfect adjustement, within 1/1000 Inch :
http://www.aa6g.org/Astronomy/Articles/knife_edge.html

This may be applied adjusting the secondary mirror position by means of a
Hartmann Mask
http://www.amtsgym-sdbg.dk/as/ccdfocus.htm#coll ?

Or is this a wild idea ?

Best greetings

Mogens W

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