Siedentopf type trinocular head, 30 degree inclination, 30mm I.D. eyetubes (TC5200, TC5400 & TC5600).
The MA816/10 uses an 80/20 beamsplitter that can be engaged for photo-microscopy. (100% to eyetubes or 80% to phototube and 20% to the eyetube.) Each microscope head has the eyetubes inclined at 30 degrees with the left eyetube having graduated diopter settings. The interpupillary distance on the viewing heads is adjustable between 53mm - 75mm. An optional ergonomic binocular head is also available.