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A 25-inch Breakthrough.
A 25-inch Breakthrough.
- 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.
- Subjects :
- *TELESCOPE mounts
*TELESCOPE mirrors
*GRINDING & polishing
*PARABOLIC reflectors
Subjects
Details
- Language :
- English
- ISSN :
- 00376604
- Volume :
- 137
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Sky & Telescope
- Publication Type :
- Periodical
- Accession number :
- 133247032