BINOCULAR OBSERVATION HEADBinocular observation head inclined at 45° rotatable at 360°.Diopter adjustment ring on ocular tube. Interpupillary distance from 55mm to 75mm. EYEPIECEWide field 10X(Paired) FOV 18mmOBJECTIVES(finite)S-Plan Achromatic 4X S-Plan Achromatic 10XS-Plan Achromatic 40X(S L) S-Plan Achromatic 100X Oil(S L)MECHANICAL BODY a) Co-axial focusing system. PRE-FOCUSING LEVER & TENSION ADJUSTMENT RING. The slow motion has 1Div=0.002mm. b) Quadruple nosepiece revolves on ball bearing. c) Mechanical stage size 140mm X 140mm having low positioned co-axial controls on ball bearing. d) Built-in-base illumination system with 6V-20W halogen bulb and power supply.e) Cross movement 55mm X 75mm. SUB STAGE CONDENSERAbbe Condenser N.A.1.25 swing out filter holder, Iris Diaphragm.STANDARD ACCESSORIESBlue & Grey filter, Halogen lamp 6V-20W. STYRO FOAM Molded pack.