Check the listing for details. LEITZ WETZLAR PERIPLAN 10X M MICROSCOPE EYEPIECE WITH VARIABLE DIOPTER. Condition: Used. Listed at 35.00 USD. Leitz Wetzlar Periplan 10x M microscope eyepiece with very smooth variable eyepiece diopter as shown. Excellent condition, glass and coatings very good, very clear view. Diopter adjustment is very smooth. 23.22mm barrel diameter. 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 over 50 years of experience 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.