It has a whopping numerical aperture of 1.40 and a working distance of 0.21mm. It has superior performance in all bright field microscopy procedures. It requires use of a cover slip thickness of 0.17mm. The Nikon product numb is: MRD01601 with a current List Price 4664.00. The optical condition is perfect on this objective with only a few blemishes to the metal case.It has been used as a dealer's demonstrator. International Buyers - Please Note. PLEASE DO NOT ASK FOR A LOWER PRICE DECLARATION. Personal checks will require 7-days to clear. The item "Nikon CFI Plan APO 60X Microscope Objective" is in sale since Wednesday, June 18, 2014. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Microscope Objectives". The seller is "loswah" and is located in Abingdon, Virginia. This item can be shipped worldwide.