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Vortex Diamondback HP riflescopes instruction manual



This text is a transcription of the file in PDF format.

Specifically designed for the most discriminating hunters and shooters,
the Vortex®Diamondback®HP™ series of riflescopes offer the highest
levels of performance and reliability. With features such as 4x optical
zooms, side focus, generous long eye relief, and ruggedly constructed
single-piece main tubes, these Diamondback riflescopes are ready for
any situation.

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

Reticle Options

The Focal Plane

All riflescope reticles can be termed either first focal plane (FFP) or
second focal plane (SFP), depending upon their internal location within
the riflescope. This model features the second focal plane design.

Second Focal Plane Reticles

Second focal plane (SFP) reticles are located near the scope’s eyepiece
behind the image erecting and magnifying lenses. This style of reticle
does not visually change in size when you change the magnification.
The advantage of an SFP reticle is that it always maintains the same
ideal visual appearance. Listed reticle subtensions used for estimating
range, holdover, and wind drift correction are only accurate with the
magnification set at the highest magnification.

Riflescope Adjustments

Reticle Focus

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

The Diamondback HP riflescopes use a fast focus eyepiece designed to
quickly and easily adjust the focus on the riflescope’s reticle.

To adjust the reticle focus:
• Look through the riflescope at a
blank white wall or up at the sky.
• Turn the eyepiece focus knob in or
out until the reticle image is as crisp as
• Note: Try to make this particular
adjustment quickly, as the eye will try to
compensate for an out-of-focus reticle

Once this adjustment is complete, it will not be necessary to re-focus
every time you use the riflescope. However, because your eyesight may
change over time, you should re-check this adjustment periodically.

Looking directly at the sun through a riflescope, or any optical instrument,
can cause severe and permanent damage to your eyesight.

Windage and Elevation Adjustments

The Diamondback HP riflescope incorporates adjustable elevation and
windage turret dials with audible clicks. Each audible click moves the
bullet’s point-of-impact 1/4 of a minute of angle (MOA).

1/4 MOA closely corresponds to 1/4 inch at 100 yards, 1/2 inch at 200
yards, 3/4 inch at 300 yards—taking four (4) clicks to move the bullet’s
point-of-impact approximately one inch at 100 yards.

To make adjustments:

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

1. Remove the outer covers.

2. Turn the turret in the appropriate
direction: Up/Down or Left/Right as
indicated by the arrows.

3. Following the directional arrows, turn
the dials in the direction you wish the
bullet’s point-of-impact to go to.

Note: After sight-in, you can re-align the zero marks on the turret dials
with the reference dots if you wish (see Indexing Adjustment Dials with
Zero Reset on page 12). Replace outer covers when done.

Variable Power Adjustments

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

To change the magnification, turn
the magnification ring to the desired

Using the Side Focus

Diamondback HP riflescopes use a side focus adjustment which provides
maximum image sharpness and eliminates parallax error.

Setting the side focus:

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

1. Be sure the reticle is correctly focused (see Reticle Focus on page 5).

2. Turn the side focus knob until the target image is as sharp as
possible. The yardage numbers referenced
on knob should closely match the actual
yardage to the target.

3. Check for parallax error by moving
your head back and forth while looking
through the scope. The focus is correct if
there is no apparent shift of the reticle on
the target. If you notice any shift, adjust
the focus knob slightly until all shift is eliminated.

Parallax is a phenomenon that results when the target
image does not quite fall on the same optical plane as
the reticle within the scope. When the shooter’s eye
is not precisely centered in the eyepiece, there can be
apparent movement of the target in relation to the
reticle, which can cause a small shift in the point of
aim. Parallax error is most problematic for precision
shooters using high magnification.

Riflescope Mounting

To get the best performance from your Diamondback HP riflescope,
proper mounting is essential. Although not difficult, the correct steps must
be followed. If you are unsure of your abilities, it would be best to use the
services of a qualified gunsmith.

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

Rings and Bases

Mount an appropriate base and matching rings to your rifle according
to the manufacturer’s instructions. Diamondback HP riflescopes require
1-inch rings.

Use the lowest ring height that will provide complete clearance of scope
and rifle—avoiding any contact with barrel, receiver, bolt handle or any
other part of the rifle. A low mounting height will help assure proper
cheek weld, aid in establishing a solid shooting position, and promote fast
target acquisition.

Eye Relief and Reticle Alignment

After installing the bottom ring halves on the mounting base, place the
riflescope on the bottom ring halves and loosely install the upper ring
halves. Before tightening the scope ring screws, adjust for maximum eye
relief to avoid injury from recoil:

1. Set the riflescope to the middle of its magnification range.

2. Slide the riflescope as far forward as possible in the rings.

3. While viewing through the riflescope in a normal shooting
position, slowly slide the riflescope back towards your face. Pay
attention to the field of view. Stop sliding the riflescope back as soon
as you see the full field of view.

4. Without disturbing the front-back placement, rotate the riflescope
until the vertical crosshair exactly matches the vertical axis of the
rifle. Use of a reticle leveling tool, a weight hung on a rope, flat feeler
gauges, or a bubble level will help with this procedure.

After aligning the reticle, tighten and torque the ring screws down per
the manufacturer’s instructions.

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

Bore Sighting

Initial bore sighting of the riflescope will save time and money at the range.
This can be done in a number of ways. A mechanical or laser bore sighter
can be used according to the manufacturer’s instructions. On some rifles,
bore sighting can be done by removing the bolt and sighting through the

To visually bore sight a rifle:

• Place the rifle solidly on a rest and remove the bolt.

• Sight through the bore at a target approximately 100 yards away.

• Move the rifle and rest until the target is visually centered inside the

• With the target centered in the bore, make windage and elevation
adjustments until the reticle crosshair is also centered over the target.

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42

Final Range Sight-In

After the riflescope has been bore-sighted, final sight-in should be done
at the range using the exact ammunition expected to be used while
shooting. Sight in and zero the riflescope at the preferred distance. 100
yards is the most common zero distance, although a 200 yard zero may
be preferred for long range applications.

Note: Be sure the reticle is in focus (see Reticle Focus on page 5) and
set the side focus adjustment (if present) to match the distance being
used for sight-in:

• Following all safe shooting practices, fire a three-shot group as
precisely as possible.

• Next, adjust the reticle to match the approximate center of the shot
group (see Windage and Elevation Adjustment on page 6).
Note: If the rifle is very solidly mounted and cannot be moved, simply
look through the scope and adjust the reticle until it is centered on the
fired group.

• Carefully fire another three-shot group and see if the bullet group is
centered on the bullseye.

This procedure can be repeated as many times as necessary to achieve a
perfect zero.

Indexing Adjustment Dials with Zero Reset

Diamondback HP riflescopes feature windage/elevation dials that allow
you to re-index the zero indicator after sight-in without disturbing your
settings. Though not required to do, this process will allow you to quickly
return to your original zero if temporary corrections are dialed in the field.
Reset the windage and elevation dials in this way:

Vortex Diamondback HP 4-16x42
Vortex Diamondback HP 4-16×42



The fully waterproof and fogproof Diamondback HP riflescope requires
very little routine maintenance other than periodically cleaning the
exterior lenses. The exterior of the scope may be cleaned by wiping with
a soft, dry cloth.

When cleaning the lenses, be sure to use products, such as the Vortex
Fog Free cleaning products or LensPen, that are specifically designed for
use on coated optical lenses.

• Be sure to blow away any dust or grit on the lenses prior to wiping the
• Using your breath, or a very small amount of water or pure alcohol, can
help remove stubborn things like dried water spots


All components of the Diamondback HP riflescopes are permanently
lubricated, so no additional lubricant should be applied.

Note: Other than removing the turret caps, do not attempt to disassemble
any components of the riflescope. Disassembling of riflescope may void


If possible, avoid exposing your Vortex riflescope to direct sunlight or any
very hot location for long periods of time.


Sighting-in Problems

Many times, problems thought to be with the scope are actually mount
problems. Be sure that correct base and rings are being used in the correct
orientation, and that the base screws and rings are tight. Insufficient
windage or elevation adjustment range may indicate problems with rings,
base, base alignment, base mount holes drilled in the rifle’s receiver, or
barrel/receiver alignment.

Check for Correct Base and Ring Alignment

• Roughly center the reticle by adjusting both windage and elevation
turrets to the mid point of their travel ranges.

• Attach bore sighter, or remove bolt and visually boresight rifle.

• Look through the scope. If the reticle appears way off center on the
boresighter image or when compared to the visually centered target when
looking through rifle’s bore, there may be a problem with the bases or rings
being used. Confirm that correct base and rings are being used—and in the
proper orientation.

Tips for Solving Bullet Grouping Problems

• Maintain a good shooting technique and use a solid rest.

• Check that all screws on rifle’s action are properly tightened.

• Be sure rifle barrel and action are clean and free of excessive oil or
copper fouling.

• Check that rings are correctly torqued per the manufacturer’s instructions.

• Some rifles and ammunition don’t work well together—try
different ammunition and see if accuracy improves.

The VIP Warranty

We build optics based on our commitment to your absolute satisfaction.
That’s why Vortex products are unconditionally guaranteed and we make
this Very Important Promise to you—a Very Important Person.
Rest assured that in the event your Diamondback HP riflescope becomes
damaged or defective, Vortex Optics will repair
or replace the riflescope at no charge to you.
Call Vortex Optics at 800-426-0048 for prompt,
professional, and friendly service.

Vortex Optics
2120 West Greenview Drive
Middleton, WI 53562
[email protected]

Note: The VIP warranty does not cover theft, loss, or deliberate damage
to the product.



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