This is description of this part:
This is the main, central, right-angled mirror prism from the large, black Lomo AU-26 binocular microscope head. This is the prism located under the model name plate.
What is this part needed for?
- if your head is delaminating, chipped, cracked, scratched, or discolored on the prism
- if the mirror surface is oxidized
- if fungus (mold) has destroyed the anti-reflective surface