Duncan Mask for Celestron CPC8 by mr_milo 3d model
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Duncan Mask for Celestron CPC8 by mr_milo

Duncan Mask for Celestron CPC8 by mr_milo

by Thingiverse
Last crawled date: 2 years, 12 months ago
This is my 3D printed version of the Duncan mask I previously made out of foam sheets.
I first saw the idea at: http://alpha-lyrae.co.uk/2013/12/31/schmitt-cassegrain-collimation-made-easy-using-a-duncan-mask/
I then made a foam sheet version of it which I posted at Cloudynights.com: https://www.cloudynights.com/topic/585763-collimate-collimate-collimate-you-will-be-glad-you-did/page-2
Finally when I got access to a large format 3D printer I transfered the design to FreeCAD and have printed two of them. These work great for my Celestron CPC8 and my friend's older Celestron C8 Deluxe.
Enjoy!

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