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Home > Classifieds > Astromart Classifieds > Telescope - Refractor > Classified #103170

For Sale: 5" f/5 folder refractor.

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This is an old telescope used for I don't know what. It has an uncoated, cemented 5" (clear aperture 124mm), achromat. The light path goes down the tube, hits a 3" flat and is reflected up the smaller tube. The focus point is about 1" inside the smaller tube. The smaller tube has an I.D. of just over 1.25" and there is a compression fittng at the end. There are three mounting tangs on the outside of the main tube. The main lens has a few "snowflakes" where the cement between the elements is crystalizing. There is also a spot about 2" long at the very edge where the glass looks cracked. This extends only a mm or so into the clear aperture. There is also a sticked taped on it which says "Do Not Use Return for Calibration" and is stamped May 1982. The sticker is also printed with "JPL 1463 Date Sept 1963". My guess, strictly a guess, is that this was used to hookup a video camera on a tracking mount to view rocket tests. If anyone knows better please let me know. Not an AP apo but makes a good low power image and should be fun to play with. Weighs about 6 pounds. More pictures on request. I'll answer any questions as best I can. $100 shipped in lower 48/OBO. That's a foot long ruler in the picture, if I can get it to load properly.

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