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A 25-inch Breakthrough.

Authors :
Oltion, Jerry
Source :
Sky & Telescope. Feb2019, Vol. 137 Issue 2, p70-73. 4p. 12 Color Photographs.
Publication Year :
2019

Abstract

The article discusses the innovative telescope of Mel Bartels. Topics mentioned include the elimination of Dob's hole, the gymbal lock experienced when observing near the zenith with a Dobsonian mount, in Bartels' scope, his move to polish and parabolize a mirror through using his own grinding and polishing machine, and the addition of a second axis to let him observes an object through the zenith without twisting the scope in azimuth.

Details

Language :
English
ISSN :
00376604
Volume :
137
Issue :
2
Database :
Academic Search Index
Journal :
Sky & Telescope
Publication Type :
Periodical
Accession number :
133247032