Here is a Olympus UApo/340 40x/1.35 Oil Microscope Objective Unit 4. This Olympus UApo/340 microscope objective lens is a powerful tool for professionals in physical, biological, and medical laboratories. Made in Japan, it has an objective magnification of 40x and is suitable for use in fields such as hematology, oncology, urology, and ophthalmology, among others. It is designed for use with the latest microscope equipment and is sure to provide accurate results for your research needs.