Get from Amazon : http://www.amazon.com/gp/product/B006MM2ZQW?tag=wayofcats-20
AmScope SM-4TZZ-144A Professional Trinocular Stereo Zoom Microscope WH10x and WH20x Eyepieces
Professional stereo microscope with boom stand has long working distance to enable users to perform work or manipulate large items including circuit boards and dental appliances
Trinocular viewing head with pairs of 10x and 20x super-widefield eyepieces adjustable interpupillary distance fixed 45-degree vertical inclination to reduce eye and neck strain and 360-degree rotation capability to enable sharing
07x-45x zoom objective provides continuous zoom magnification and longer focal length for inspecting large-scale specimens a 05x Barlow lens extends the working distance and a 20x Barlow lens extends the magnification range
Removable rheostat-controlled 144-bulb LED has four separate zones to independently control light intensity and direction
Double-arm boom stand has 20 arms and 17 pillar to enable users to position the microscope head on three axes X Y and Z :
