Olympus Splan Apochromatic 40X microscope objective. The objective has product number of 1-LB570 with a last list price of $3,013.00 and is intended to be used on the BH2, BHS, BHTU, and Vanox 160mm TL microscopes. The objective pictured has been tested and found to be optically perfect, spring loaded, and coverglass correction collar. It has an NA of 0.95, a working distance of 0.13 mm. This is a truly elegant objective! Thank You For Looking!