Zenith STZ-3500 & STZ-4500 x7-x45 Zoom Stereoscopic Microscopes

High performance full sized professional zoom stereo microscopes ideal for use over a wide range of industrial, medical & educational applications. Features x7-x45 continuous zoom facility providing delightfully sharp, crisp, upright stereoscopic images. The magnification can be increased up to x180 with addition of the optional eyepieces and supplementary objectives that are available. Two identical models are available with the choice of either binocular or trinocular viewing heads.

Optical microscopes
Main article: Optical microscope
Optical microscopes, through their use of visible wavelengths of light, are the simplest and hence most widely used type of biology and geology.

Optical microscopes use refractive lenses, typically of glass and occasionally of plastic, to focus light into the eye or another light detector. Typical magnification of a light microscope is up to 1500x with a theoretical resolution of around 0.2 micrometres or 200 nanometers. Specialised techniques (e.g., scanning confocal microscopy) may exceed this magnification but the resolution is an insurmountable diffraction limit.

Various wavelengths of light are sometimes used for special purposes, for example, in the study of biological tissue.[2] Ultraviolet light is used to illuminate the object being viewed in order to excite a fluorescent dye which then emits visible light. Infrared light is used to study thick slices of biological tissue because infrared light's low diffraction coefficient permits viewing deeper into tissue.

Other microscopes which use electromagnetic wavelengths not visible to the human eye are often called optical microscopes. The most common of these, due to its high resolution yet no requirement for a vacuum like electron microscopes, is the x-ray microscope.



Standard Specification:

• Magnification x7 -x45
  
• (Magnification of x3.5 -x180 achievable by upgrading with the optional eyepieces & supplementary objective lenses listed below)
  
• Paired widefield eyepieces x10
  
• Zoom Objective magnification ratio x0.7 -x45
  
• Binocular Head(STZ-3500)/Trinocular Head(STZ-4500)
  
• Working distance 95mm
  
• Field of view 4.4 - 28.6mm
  
• 230v/6v 20w halogen incident illumination (positionable)
  
• 230v 6v fluorescent transmitted illumination
  
• Binocular head inclined 45degrees, rotatable 360degrees
  
• Full interpupillary & dioptric adjustment provided
  
• Rack and pinion focussing
  
• Stereo head height adjustable on pillar to accommodate specimens of varying sizes
  
• Supplied with dust cover
  
• Dimensions 250x160x410mm
  
• Weight 6.5kg