Schmitt-Cassegrain Collimation Made Easy Using a Duncan Mask | Alpha Lyrae

Possibly one of the best and easiest ways to collimate an SCT!

Schmitt-Cassegrain Collimation Made Easy Using a Duncan Mask | Alpha Lyrae

Very simple method of achieving excellent collimation of a Schmitt-Cassegrain using a home made Duncan Mask.

Source: alpha-lyrae.co.uk/2013/12/31/schmitt-cassegrain-collimation-made-easy-using-a-duncan-mask/


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