Bushnell 65-4305M Owner's Manual - Page 7

Adjustment Scale, Index Line

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A B RESETTING THE DIALS TO ZERO Once the turret bolt is loose (or removed), and you are able to pull up the elevation turret and rotate it freely, line up the "0" on the adjustment scale with the index line, then push the turret back down into place. Be careful not to lose any clicks when pushing the turret back down, which might affect your targeting at the next use. Replace the turret bolt and use the Allen wrench to tighten it (turn clockwise) until the turret is securely in place. Repeat this process with the windage turret. Adjustment Scale Index Line USING THE SIDE FOCUS CONTROL (ADJUSTING FOR PARALLAX) You may have noticed that placing your eye at different positions behind the scope's eyepiece causes the reticle crosshairs to appear to move around to different points on your target. This is called "parallax error" (target and reticle are not in the same focal plane), and it becomes more noticeable (and more of a problem) at shorter distances and/or when the scope is set to higher powers. Your tactical riflescope provides an adjustment for parallax compensation, which works by moving an optical element until the target (based on its distance) appears in the same plane of focus as the reticle. Instead of the typical parallax compensation design which adjusts the objective lens at the front of the scope ("adjustable objective" or "AO"), your scope uses an movable lens back near the reticle, so the adjustment can be more easily made with a "side focus" knob placed next to the windage and elevation adjustments. Just line up the estimated distance (on the side focus dial- you may want to use the mil dot reticle to range it first) to your target with the index line on the body of the scope, and you will eliminate the aiming errors caused by parallax. After setting the side focus, you can double check by moving your head around from side to side behind the eyepiece-the point of aim should not shift if the side focus is correctly set. An alternative method is to look through the scope and turn the Objective Adjustment Ring until the target, at whatever range, is sharply focused. 7

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7
RESETTING THE DIALS TO ZERO
Once the turret bolt is loose (or removed), and you are able to pull up the elevation turret and rotate it freely,
line up the "0" on the adjustment scale with the index line, then push the turret back down into place. Be
careful not to lose any clicks when pushing the turret back down, which might affect your targeting at the
next use. Replace the turret bolt and use the Allen wrench to tighten it (turn clockwise) until the turret is
securely in place. Repeat this process with the windage turret.
USING THE SIDE FOCUS CONTROL (ADJUSTING FOR PARALLAX)
You may have noticed that placing your eye at different positions behind the scope’s eyepiece causes
the reticle crosshairs to appear to move around to different points on your target. This is called “parallax
error” (target and reticle are not in the same focal plane), and it becomes more noticeable (and more of
a problem) at shorter distances and/or when the scope is set to higher powers. Your tactical riflescope
provides an adjustment for parallax compensation, which works by moving an optical element until the
target (based on its distance) appears in the same plane of focus as the reticle. Instead of the typical parallax
compensation design which adjusts the objective lens at the front of the scope (“adjustable objective” or
“AO”), your scope uses an movable lens back near the reticle, so the adjustment can be more easily made
with a “side focus” knob placed next to the windage and elevation adjustments. Just line up the estimated
distance (on the side focus dial- you may want to use the mil dot reticle to range it first) to your target
with the index line on the body of the scope, and you will eliminate the aiming errors caused by parallax.
After setting the side focus, you can double check by moving your head around from side to side behind the
eyepiece-the point of aim should not shift if the side focus is correctly set. An alternative method is to look
through the scope and turn the Objective Adjustment Ring until the target, at whatever range, is sharply
focused.
A
B
Adjustment Scale
Index Line