TRINOCULAR OBSERVATION HEADSiedentopf observation head inclined at 30°. Phototube for micro photography.Diopter adjustment ring on ocular tube.Interpupillary distance from 50mm to 75mm.EYEPIECEWide field eyepiece 10X (Paired) FOV 18mmOBJECTIVES INFINITY CORRECTEDM Long Working Distance Plan Achromatic 10XM Long Working Distance Plan Achromatic 20XM Long Working Distance Plan Achromatic 40X ( 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 150mmX140mm.d)The Mechanical stage has low positioned co-axial controls on ball bearing guide ways. e)Hand rests on both sides.POLARIZING OUTFITAnalyser rotatable 360o. Polarizing & Analyser can be slided in/out of the optical path.ILLUMINATORThe Epi illuminator has 6V-20W halogen lamp, adjustable brightness.STANDARD ACCESSORIESBlue, Yellow & Green filters. 6V/20W Halogen tungsten bulb. STYRO FOAM molded pack.