National Optical 440-440PLL Zoom Binocular Stereo Microscope (Dual LED Base)

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.

• 0.75x to 4.5x zoom magnification eyepieces
• Paired wide field 10x eyepieces are 45° inclined, with dual diopter adjustments, interpupillary adjustment from 55- 75mm
• Accepts 23mm eyepiece reticle
• Viewing head rotates 360°
• Continuous magnification from 7.5x through 45x

• Large dual focusing knobs with slip clutch to prevent damage to mechanism
• Tension adjustment eliminates focus 'drift'

• Top light is LED with directional beam and rheostat control
• Bottom light is LED for cool operation, greater light efficiency
• Base mounted light controls permit choice of top only, bottom only, or dual illumination
• Heavy-duty 3-wire grounded cord and plug
• 110-240V internal auto-switching power supply
• Supplied with American-style IEC power cord
• Additional wall adapter required for 240V operation

• Two 80mm stage plates (frosted glass and reversible black/white plastic contrast plates)
• Blue filter for transmitted light
• Locked-on stage clips
• Professional all-metal frame, gray enamel finish
• Heavy-duty post mount with locking support collar, permits up or down adjustment of viewing head to accommodate different-sized objects on stage