Olympus E A40X microscope objective. The objective is primarily intended to be used on the CH2 microscope but works just fine on the BH2, BHS, BHTU, IMT2, CK and Vanox 160mm TL microscopes. Each objective pictured has been tested and found to be optically perfect and as can be seen the cosmetic condition varies. It has an NA of 0.65 and requires a 0.17 mm thick coverslip. THE SALE IS FOR ONE EACH. Thank You For Looking!