Replacement Olympus 40X objective for BX41 microscope

Olympus Microscope Plan N 40x/0.65 Objective 0.65 NA ∞/0.17/FN22 Olympus Part# 1-U2B227 This item is in excellent condition and produces a good image. Olympus model microscopes: Fits all Olympus BX40, BX41, BX45, BX61, BX50, BX51, BX43, BX53, and BX63 series microscopes. This Olympus 40X is a great objective to have an extra of.  The 40X is the most commonly fouled objective by oil.  The oil can sometimes be difficult to clean off, so it's always nice to have a back up until a microscope service tech can come clean your fouled objective.