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STRANGE MIL OPT INSTR TRIPLET LENS

$15.00 USD
Product Code: L14800
Availability: In Stock

Very unusual military cemented triplet lens, coated.  31.8mm diameter by 21.2mm center thickness.  Top element is dome shaped.  Bottom element is tapered to a 12mm clear opening.  See photos.  Lens has a negative focal length of -83mm in one direction and -28 in the other direction.  The interesting thing is that you can look thru the dome and see an enlarged image of something placed under the bottom edge. Military NSN #66500114255540.  Made for some military optical instrument.  Unused.  Only have a few.

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