See also: Category:Olympus
BH2 and such
Optical microscope (OM):
The BH2 and BH3 are mostly the same with the addition of the BH3's motorized turret. BH parts are generally mecanically compatible but optically incompatible with BH2/BH3 due to the move from finite to inifinity optics. This includes but is not limited to the objective, illuminator, and eyepieces. If you try to mix them your image quality will degrade.
Ex: the BH RMS nosepiece can be used with finite objectives on the BH and used with MSPlan infinity corrected objectives on the BH2/3. Thus, while the part is mechanicly compatible the optics aren't.