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Images uploaded for illustration purposes in various CN forum posts
Other Albums by jkmccarthy
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My 1980 N. Remer Optics 6" f/15 Lens Kit BK7-F4 Objective
36 images, 0 comments
Last upload: 14 Sep 2021 - 23:10
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Vixen 80mm / 1200mm (f/15) Zen-market purchase, unboxing
22 images, 0 comments
Last upload: 26 Jun 2021 - 00:31
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eBay Nikon F lens mount-to-M42 (T-ring) + M42 to 1.25" EP
5 images, 0 comments
Last upload: 25 Mar 2021 - 19:37
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PSU Berks Campus Alumni News Fall 1979
The teenage me pictured holding an 8" f/12 folded OTA (home-made fr...
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Kosmos Schul Fernrohr A 61
Advertisement for Cosmos School Telescope Model A 61 (in German, "K...
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http://www.astrometrica.at/Images/200310.jpg
Astrometrica.ca 's "Image of the Month" for Oct 2003, shows Melissa...
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Caltech Emeritus Professor Jessie Greenstein, visiting the Palomar 200-inch Hale Telescope Prime Focus Cage in 1995, at age 85
See the accompanying article here: https://www.tommcmahon.net/201...
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Leslie Peltier's 6 inch Fitz Refractor with mahogany tube
Screen-capture of page 16 from the PDF available here: https://ww...
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William Mogey catalog (1927) pp. 18-19
Downloaded from an eBay auction for a 1927 William Mogey catalog.
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Palomar Hale Telescope Cassegrain f/16 to f/9 Focal Reducer lens profiles
A little known (and little used) feature of the 200-inch Hale Teles...
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TS-Optics ACUR1 1.25" Crayford Focuser
Archived copy of a 1.25" focuser retailer photo found on-line here:...
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Spacek Observatory 8 inch Folded Refractor circa 2015
Photo taken circa 2015 by LVAAS archivist, Ms. Sandy Mesics, inside...
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Spacek Instrument Company advertisement
Advertisement for the Spacek Instrument Company, Pottstown, PA. Dat...
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Athermal Objective Lens Cell
Cartoon illustrating the design concept (credit: mechanical enginee...
