Unknown microscope phototube adapter Auxiliary Objective Lens connector

AmScope AD-C20 0.5X C-mount Lens Adapter for Microscope Video Cameras

Olympus Photomicrography Camera Polaroid Back PM-10AD, DL-W & PM-CP-W

Olympus Microscope Camera C-35AD-4 Controller PM-10AK 35mm for Parts

Nikon HFX-II A camera adapter Auxiliary Objective Lens microscope

0.3X 0.5X 0.75X 1.5X 2X Auxiliary Objective Barlow Lens 42mm Stereo Microscope

Barlow Lens Auxiliary Objective Lens 1-3/4" 1X 42mm 0.35X 0.3X 0.5X 2X 1pc

Olympus C-35DA-2 Microscope Camera & PM-10AK Exposure Control Adapter