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Item #521.
Trihedral Retro-reflector, 75mm diameter. Originally used as 3-facet scanner mirror. Aluminized surfaces show minor abrasion.

$ 15

Item #522.
 Used elliptical diagonal mirror, gold coated. 65mm minor axis x 16mm thick. Aluminum mount. Slight abrasion on gold coating.

$ 15

 

Item #523.
Uncoated plano-convex lens. 60mm diameter, 60mm focal length. Mounted in aluminum tube, 70mm diameter.

$ 5

Item #524. Used Projection Lens, multi-element, coated. Approx 250mm focal length, 75mm clear aperture. Mounted assembly is 95mm diameter, 96mm long. Unknown mfg.

$ 15

Item #202. Ground Glass 3-1/2" x 4-3/8" x 1/16", ground on one side.
 
$ 2
Item #224.  Alloy Aluminum Mirror Making Kit: Two 112mm dia x 15mm thick alloy blanks (one for mirror, one for tool) plus instructions for grinding and polishing.

$ 20

 
Item #471. Alloy Aluminum Mirror Making Kit: Two 102mm dia x 14mm thick alloy blanks (one for mirror, one for tool) plus instructions for grinding and polishing.

$ 17

Item #222. Alloy Aluminum Mirror Making Kit: Two 88mm dia x 13mm thick alloy blanks (one for mirror, one for tool) plus instructions for grinding and polishing.

$ 12

Item #472. Alloy Aluminum Mirror Making Kit: Two 76mm dia x 13mm thick alloy blanks, instructions for grinding and polishing.

$ 10

Item #215. Right Angle Prism, 32mm x 32mm faces. 
$ 5
Item #448. Cylinder Lens 1.0 in x 3.5 in x approx 8 in FL.

$ 10

Item #211. Used achromatic lens, 12mm dia x 25 mm fl.

$ 3


Item #445.
Large fine ground acrylic cylinder lens blank. 6" long x 2" wide, approx 5" radius of curvature.
 

$ 5

Item #220. Borosilicate Crown II optical glass  Nd = 1.517  V64.5  10" x 6.4" x 0.27" thick.  Polished both sides.
$ 10
Item #203. New Ramsden eyepiece lens set with mounting instructions; 50mm focal length. $ 4

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