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PKG OF 2 DIFFERENT 16MM DIA LENSES FOR 25MM FL APPLICATION

$5.50 USD
Product Code: L10297
Availability: In Stock

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We think these were probably used to make a 25mm focal length Huygenian eyepiece. The box is marked, Plummer Turret C Lenses 7507-4170. There is a plano-convex lens that is 16mm in diameter by 20mm focal length. The center thickness is 3mm and the edge thickness is 2mm. The second element is a double convex lens that is 16mm in diameter by 100mm focal length. The center thickness is 3.5mm and the edge thickness is 3.15mm. Both have pinkish/purple anti-reflective coatings.

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