Metal with black crackle finish "What In The World Accu-Focus" astronomy telescope focusing lens cap for Celestron C8's. In addition to serving simply as a front cap when you remove the three smaller caps you converge the three images in your eyepiece to attain focus. Not sure what the center cap was for, though it's a bit larger than the secondary holder of a C8 so maybe for Moon observing (which can also be done by removing just one cap). Excellent condition, felt on the inside is fine.
WHO WE ARE: Oddog2 is a husband/wife team, home-based small business specializing in the buying/refurbishment/selling of primarily photographic equipment. We do occasionally have other types of things to sell that come to us as a result of our search for camera-related items. We have 47 years of experience (22 years as a hobby, 25 as a full time effort) with photographic equipment, both as a shooter (17 years newspaper photojournalist) and as a collector/restorer/seller. We have been on eBay as Oddog or Oddog2 since September 1999.
Filed under: Eyepieces & Accessories