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Observation Tubes
The observation tubes are inclined 45" (except Bi·SW and Tr-SW both
inclined 30°) and rotatable 360°. The tubes can be clamped in any
direction with the clamping screw provided.
For adjustment of interpupillary distance. hold the right and left
eyepiece tubes with both hands and push the tubes together or
pull them apart laterally, whichever is required, while looking at an
image through the eyepieces with both eyes, until perfect binocular
vision is obtained. It is good practice to memorize the individual
interpupillary distance. setting. A scale for this purpose is located
between the eyepiece tubes. (The mechanical tube length of the SW
observation tubes is 160mm when this scale is set at 62.l The eyepiece
tubes are provided with diopter and tube length adjustment rings.
A light path selector lever to direct the light to observation tube or
photo tube, is provided with the trinocular observation tube.
Photo Tube
Light Path Selector lever
;:::===---
Diopter Adjustment Rings
Clamping Screw---tllIO'lt__
Eyepiece Tube
Knurled Ring,--"'-\
11
~Knurled
Ring
-r-
Eyepiece Positioning Groove
Interpupillary
Distance
Scale
Clamping Screw