Welch Allyn Insight 13500 Directions For Use Manual page 12

8 Controls, indicators, and connectors
Binocular front view
No. Feature
1 Locking nut lever
2 Filter selection control
3 Aperture selection control
4 Light output control
5 Tilt-mirror adjustment
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Welch Allyn 13500 Insight
Description
Holds binocular in place. When unlocked, enables adjusting the
binocular's position.
Enables selection of neutral (none), red-free, amber, and cobalt
blue filters.
Enables selection of small, medium, and large apertures as well
as the diffuser.
Enables selection of zero intensity (maximum dimming) to full
intensity light output.
Controls the vertical position of the light beam.
Wireless LED Binocular Indirect Ophthalmoscope