The Centering Mirror PM-ELCS has a flat metal mirror on one surface, and is matt black on the other surface. When using the Lieberkühn Reflectors, it replaces the curved mirror that is supplied fitted to the Trans-Illuminator Base XD-E.
The first version of the mirror had a black circle in the centre of the mirror, and could be used to centre the reflected light beam from the Mirror Housings. First, place the mirror on the stage plate and centre the black circle in the field of view, using the circular part of the focusing screen as a reference. Then adjust the lighting so that it is centred on the black circle.
|US catalog no.||104-213|
To change the mirror in the Trans-Illuminator Base (taking care not to get finger marks on it):
The older version of the mirror, introduced in 1972, has a black circular line, a few millimetres in diameter, around the centre of the mirrored side. The outside is black, with the name “OLYMPUS” in white. The later version does not have the black circle, and the outside is chrome, apart from the name “OLYMPUS” in white on a black mount.
Instructions were not provided with the Centering Mirror.