MECHANISM ANO PRINCIPLE | 2. F·tube |
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2.F·tube
•Depression angle of binocular body 30°
•Tube magnification: 1X
•Spring type eyepiece sleeve will cause no slack of the eyepiece.
•Special beam splitter offers brighter images.
•Owing to Siedentopf type adopted, even though the interpupillary distance is changed (within a range of 51 - 75 mm), for which prism cover @ is vertically tumed and moved, the tube length remains constant ali the times.
•Diopter adjustment is perforrned not with the adjustment collar, but with the eyepiece with a range of
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100% for photography.
For observation, the 1X relay lenses are brought into the optical·path, and for photography, when the binocular body is tumed 60° to the left, relay lenses @ and @ and depression prism @ are swung out, thus ali the optical elements for
optical·path.
Oenm split prism
Op
Relay lcnscs
Fig. 13 |
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• lmages are produced at OL and OR by the parallel ray bearns between @, @ and @, @. | ( |