User`s guide

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Changing Lenses
To remove the Checker lens, follow the
steps listed below.
Note: Failure to follow these
instructions can cause damage to your
Checker.
1 Unscrew lens cover. Lens
is secured to lens cover by
small internal O-ring.
2 When lens is fully released,
remove cover with lens in
place.
3 Remove lens from lens cover.
Take care not to lose O-ring
that secures lens to lens
cover.
To install the Checker lens, follow the
steps listed below.
Note: Failure to follow these
instructions can cause damage to your
Checker.
1 Screw lens into Checker at
least ve full rotations.
2 Make sure both outer and
inner O-rings are seated in
place on the lens cover.
3 Firmly and evenly press the
lens cover onto Checker
until it snaps into place.
4 Screw in the lens cover to
bring Checker into focus.