Stemi 2000 microscope body - apochromatic Greenough system with stereoscopic angle 11° - manually operable zoom 7.7:1 (0.65x ... 5.0x) on both sides - switchable click stops at 0.65x-0.8x-1x-1.25x-1.6x-2x-2.5x-3.2x-4x-5x - free working distance (without dust protection cap) 92 mm - 35° viewing angle with 55 ... 75 mm adjustable interocular distance - 30 mm eyepiece mount with maximum field number 23 mm - 76 mm mount diameter - incl. M50 dust protection cap with M49x0.75 for photo filter