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Used Truss 16.5" Dobsonian, Barry Arnold Mirror & Starlight Instruments 2 speed focuser.

 This "Big Dob" was constructed in the RASC Calgary telescope making class with craftmanship by class instructor, Phil Johnson.  

The F5 mirror was crafted by Barry Arnold whose world class mirrors usually tested a wavelength of 20 or better.  

Observer & Imager Nights

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