illumination.  By using this instrument, the user can observe and 
enlarge the right side stereo image. BARSKA Model AY11234 is a 
zoom trinocular stereo microscope. The object being viewed is 
enlarged through two identical sized sets of right and left eye 
lenses. The zoom provides different magnification and features an 
inversion system which allows the image to be viewed normally 
and right side up.
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Model AY11230 Model AY11234
Diopter
Adjustment Diopter
Adjustment
Prism
Cap
Prism
Cap
Eyepiece
Stage
Lens
Stage
Vertical 
Tube
Vertical 
Tube
Illumination
Controls
Rotary
Case
Spring 
Clips
Spring 
Clips
Focus
Knob
Magnification
Adjustment
Knob
Focus
Knob
Tightening
Knob
Oblique
IlluminatorOblique
Illuminator
Lens 
Housing
Eyepiece
Illumination
Controls