A camera lens used by the commander of the 1971 Apollo 15 space mission both on the lunar surface and in orbit is up for auction.
Boston-based RR Auction says the 12-inch long Zeiss Tele-Tessar 500mm f/8 lens could get more than $500,000 during the sale that starts Thursday.
The lens was designed specifically for the Hasselblad Electric Data Camera used by astronaut David Scott to take nearly 300 photos.
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The silver lens is engraved near the mount with NASA part numbers. Special tabs were fitted to the rotational parts used to adjust the focus and f-stop to make them easier to use while wearing pressurized spacesuit gloves.
The 83-year-old Scott says in a letter that accompanies the sale that NASA gave the lens to him as a memento.