National Optical 440T-440P 440/440T Series Trinocular Zoom Stereo Microscope 0.75X-4.5X Zoom (7.5-45X Mag.) without Illumination

The 440T-440PLL is a  professional-quality stereo microscope for industrial and educational settings. 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.

Magnification

• 0.75x to 4.5x Zoom

Optical System

• Trinocular viewing head
• Paired widefield 10x eyepieces are 45° inclined, with dual diopter adjustments, interpupillary adjustment from 55mm to 75mm. Accepts 23mm eyepiece reticle.
• Viewing head rotates 360°.
• Continuous magnification from 7.5x thru 45x. 

Focusing

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

Stage

• Two 80mm stage plates (frosted glass and reversible black/white plastic contrast plates).
• Blue filter for transmitted light.
• Locked-on stage clips.

Frame

• 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.
• Height: 340mm (13-3/8 in.) extends to 433mm (17 in.) for larger objects.
• Base width: 171mm (6-3/4 in.), Base depth: 242mm (9-1/2 in.)

Packing

• Molded styrofoam container with rubber eyeshields and vinyl dustcover.