Binocular Corded LED Microscope - 168-SP Superior in design and in performance, the 167 Series incorporates a wide range of features designed for university and laboratory use. Superb optical clarity and reliable mechanical engineering assure years of top performance. This unit is supplied with semi-plan lenses which deliver excellent clarity and 80-85% flatness of field. OPTICAL SYSTEMWidefield 10x /18mm eyepiece45° inclined binocular viewing head rotates 360° for easy sharing by more than one studentDIN standard 4x (0.10 N.A.), 10x (0.25 N.A.), 40xR (0.65 N.A.) and 100xR oil immersion (1.25 N.A.) semi-plan objectives. All are parfocalled, parcentered and color-codedQuad objective turret is ball-bearing mounted for smooth, precise positioning of objectives, features textured rubber knurling for easy grip. Mounted in reverse position to facilitate ease in changing slidesILLUMINATION3W LED variable illumination110V-220V external auto-switching power supplyCE certifiedFOCUSINGCoaxial coarse and fine focusing controlsCoarse has tension adjustmentFine is graduatedSTAGELarge 140mm x 135mm rackless mechanical stageBuilt-in, low profile, ball-bearing mounted mechanical specimen holder with low-position coaxial controls, 70mm (x) by 50mm (y) movement with graduations of 0.1mm1.25 N.A. Abbe condenser has rack & pinion focusing and iris diaphragmFRAMERugged cast aluminum, gray enamel finishBase dimensions: 185mm x 235mm (7-1/4 in. x 9-1/4 in.)Height: 420mm (16-1/2 in.). Net wt. 6.3 kgs (13.9 lbs)