TRINOCULAR OBSERVATION HEADSiedentopf observation head inclined at 30° rotatable at 360°.Diopter adjustment ring on ocular tube. Interpupillary distance from 48mm to 75mm.EYEPIECEWide field eyepiece 10X (Paired) FOV 22mmOBJECTIVES (INFINITY CORRECTED)M Long Working Distance Plan Achromatic 5XM Long Working Distance Plan Achromatic 10XM Long Working Distance Plan Achromatic 50X ( S L )M Long Working Distance Plan Achromatic 80X ( S L ) DryMECHANICAL BODY a) Co-axial focusing system with large knobs, PRE-FOCUSING LEVER & TENSION ADJUSTMENT RING.b) Reverse Angle quadruple nosepiece on ball bearing.c) Mechanical stage is 242mmX172mm.d)The Mechanical stage has low positioned co-axial controls on ball bearing guide ways. e)Hand rests on both sides.ILLUMINATORThe Epi illuminator has 6V-20W halogen lamp, adjustable brightness.POLARIZING OUTFITAnalyser rotatable 360o. Polarizing & Analyser can be slided in/out of the optical path..STANDARD ACCESSORIES6V/20W Halogen tungsten bulb. Blue, Green & Yellow filters. STYRO FOAM molded pack.