or
Invitrogen EVOS 10X Objective, achromat, LWD, phase-contrast, 0.25NA/7.45WD, For Use With: EVOS M5000, EVOS M7000, EVOS FL Imaging System, EVOS XL Core Imaging System, EVOS FL Color Imaging System, EVOS FL Auto Imaging System, EVOS XL Imaging System, Lens