Using The Illuminated Reticle - Leupold FX-3 Owner's Manual

Using the Illuminated Reticle

All Leupold Illuminated Reticle scopes may be used in either the
standard or the illuminated state . When not illuminated, the reticle
performs the same as the reticle in a standard Leupold scope .
Illuminating the reticle allows a better distinction to be made
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in poorly lighted conditions between the target and the precise
position of the aiming point .
The control dial for the Leupold Illuminated Reticle
is located above the eyepiece.