LOMO OI-14 Aplanatic Microscope Condenser

The LOMO OI-14 Aplanatic Condenser is a specialized microscope condenser manufactured in the Soviet Union by LOMO (Leningrad Optical Mechanical Association). It was designed for biological microscopy and provides both direct and oblique illumination. With a high numerical aperture of 1.4 NA when used with immersion oil, the OI-14 is suitable for applications requiring high resolution and precise contrast control. One of its distinctive features is the integrated vernier-scale adjustment mechanism, which allows the internal aperture iris diaphragm to be offset by approximately ±10 mm. This enables precise adjustment of the illumination and allows the contrast of the microscopic image to be controlled. The LOMO OI-14 is an interesting and specialized instrument for microscopists, collectors of Soviet optical equipment, and users of classic biological microscopes.