The #24 mount set adapts specific shutter housing types to an IX or BX type Olympus microscope. No modification to the microscope should be necessary. A filter area is provided to allow the user to install an optical filter between the light source and the shutter housing. The housed versions of the LS, VS, and XRS series shutters, as well as the CS25 and CS35, can be configured with this mount set type. A clearance cutoff (1.38 in/35.1 mm from aperture center) is provided with the VS series only.