BINOCULAR OBSERVATION HEADSiedentopf observation head inclined at 30° rotatable at 360°.Diopter adjustment ring on ocular tube. Interpupillary distance from 55mm to 75mm. EYEPIECEEWF 10X FOV 18mmOBJECTIVES(finite)E-Plan Achromatic 4X E-Plan Achromatic 10XE-Plan Achromatic 40X(S L) E-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) Reverse angle quadruple nosepiece revolves on ball bearing. c) Mechanical stage size 125mm X 135mm 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 ACCESSORIES6V/20W Halogen Tungsten Bulb, Blue & Grey filters, STYRO FOAM Molded Pack.¬¬