Has to do with mounting of the condenser. For example, the condensers mount differently, and really can't be switched. The CH condensers mount via a collar at the top, the BH condensers via a dovetail at the base.
http://earth2geologists.net/Microscopes/OlympusScopes.htmBH Series (1974)"With the BH Modular Series, launched in 1974, the microscopes could be transformed to meet various specifications, including polarization, phase contrast, differential interference, and simple transmission fluorescence microscopy. The previous E and F Series of microscope bodies and the POS and POM models were specialized devices with more restricted uses or specifications. The BH Series, however, could be used for a wide variety of observations simply by switching the microscope head or lens modules. The BH Series was also the first Olympus product to feature a coaxial handle attachable to the left of the plane stage, which allowed the stage to be easily moved on a vertical or horizontal axis. Olympus launched the BHA and BHB models for research and test purposes, whereas the BHC model was meant for test and practical study. The BH Series was subsequently developed further into the BH2 and the BX.CH Series (1976)"In 1976, Olympus launched the CH Series, a modular biological microscope for practical laboratory teaching applications, in place of the KHS, KHC, HSB, and HSC. The CH Series could meet diverse needs because of its excellent performance and modular design. The Series comprised three models: the CHA (6V 10W halogen light source), CHB (20W tungsten light source), and CHC (the mirror CH-MM or the CH-LSK 20W with a simple illumination device). The Series was painted in a warm gray color. By switching modules, the microscope could be used for simple polarization, drawing, or incident light (metallurgical) microscopy. The CH Series used the same modules as the BH Series. The CH Series was marketed for 10 years, until the release of the CH2 Series.
Fitted to the CH-2 it looks like this:
Fitted to the BHS it looks like this:
Quick Reply
