NEC NP1250 - Page 157

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8. Using Optional Lenses
Using the anti-theft screw to prevent theft of the lens
Tighten the supplied anti-theft screw on the front bottom.
Hole of anti-theft screw for lens unit
Install the new lens
1. Insert the lens with the yellow protrusion on top.
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2. Rotate the lens clockwise.
Rotate the lens until you feel it click into place.
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RIGH
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Yellow
Protrusion