NA440440PLL

440-440PLL

National Optical

The 440-440PLL Zoom Binocular Stereo Microscope with dual LED base from National Optical is a professional-quality stereo microscope for industrial and educational settings. The 0.75-4.5x eyepieces combine with the 10x objective for a magnification range of 7.5-45x, and the overall height adjusts 13.4-17" to accommodate larger objects. The large zoom ratio of 6:1 and a standard working distance of 110mm provide the flexibility to support a large number of potential applications while the addition of an auxiliary lens or substitute eyepieces extend the magnification up to a maximum of 180x.Optical System 0.75x to 4.5x zoom magnification eyepiecesPaired wide field 10x eyepieces are 45 inclined, with dual diopter adjustments, interpupillary adjustment from 55- 75mmAccepts 23mm eyepiece reticleViewing head rotates 360 Continuous magnification from 7.5x through 45xFocusing Large dual focusing knobs with slip clutch to prevent damage to mechanismTension adjustment eliminates focus 'drift'Illumination Top light is LED with directional beam and rheostat controlBottom light is LED for cool operation, greater light efficiencyBase mounted light controls permit choice of top only, bottom only, or dual illuminationHeavy-duty 3-wire grounded cord and plug110-240V internal auto-switching power supplySupplied with American-style IEC power cordAdditional wall adapter required for 240V operationStage and Frame Two 80mm stage plates (frosted glass and reversible black/white plastic contrast plates)Blue filter for transmitted lightLocked-on stage clipsProfessional all-metal frame, gray enamel finishHeavy-duty post mount with locking support collar, permits up or down adjustment of viewing head to accommodate different-sized objects on stage