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 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
Focusing
- Large dual focusing knobs with slip clutch to prevent damage to mechanism
- Tension adjustment eliminates focus 'drift'
Illumination
- 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
Stage and Frame
- 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