Bushnell 51-0021, 52-0021 instruction manual Basic Operation, Replacing Batteries

Congratulations on your choice of a BUSHNELL® HOLOsight®, a revolutionary sighting system based on advanced holographic technology. The BUSHNELL HOLOsight enhances target acquisition, improves accuracy, and provides more control over your shooting environment.

The BUSHNELL HOLOsight fills the needs of all shooters from the novice to the most advanced professional. Our objective is to give each and every customer the quality, commitment, and service expected from the sighting industry leader. Whatever your shooting discipline, we wish you the best shooting, and again, we thank you for choosing the BUSHNELL HOLOsight.

Please read the instructions carefully before mounting and using the sight and always practice proper firearm safety.

Included: Sight assembly, 2 AA or N alkaline batteries

Model 51-0021– is powered by two N type 1.5 volt Alkaline batteries. We recommend the use of EVEREADY® ENERGIZER® batteries with the Bushnell HOLOsight in cold weather. Please note that there is a 12 Volt battery that is approximately the same size as the Type N 1.5 volt battery. DO NOT USE THE 12 VOLT BATTERY. It will severely damage your sight.

Model 52-0021– is powered by two AA type 1.5 volt Alkaline batteries. The AA HOLOsight can utilize various types of batteries. Bushnell recommends Energizer batteries for regular use. NiMH rechargeable batteries are the most cost effective in the long run, but do need to be charged regularly as they do not hold a charge in storage well. For cold temperatures, Lithium AA batteries offer the longest battery life. However, please note that the battery test function which is designed to work with Alkaline batteries does not function accurately with Lithium batteries.

It is a good idea to change batteries before an extended hunting trip or match. For a comparison of battery life at various temperatures, please see the graphs :

You will need a 7/64" Allen wrench.

Holographic	Removable Battery
Window	Compartment

FIGURE 1

Battery Life at Brightness Setting 12

Room Temp (21 deg C/70 deg F) Low Temp (-14 deg C/-7 deg F))

	600
	500
Hours	400
	300
	200
	100
	0

N Alkaline AA Alkaline AA NMHi AA Lithium

Battery Type

Battery Life at Brightness Setting 20

Room Temp (21 deg C/70 deg F) Low Temp (-14 deg C/-7 deg F)

	40
	35
	30
Hours	25
	20
	15
	10

5

0

N Alkaline AA Alkaline AA NMHi AA Lithium

Battery Type

On/Off & Brightness	Windage Adjustment
Adjustments Switches
Universal Mount	Elevation Adjustment

BASIC OPERATION

The BUSHNELL HOLOsight uses laser light to illuminate a holographic reticle pattern embedded in the heads-up display window and forms a virtual image of a reticle pattern. The shooter looks through the heads-up display window and sees a bright red image of a reticle pattern projected onto the target plane. There is absolutely no light projected onto the target plane, and the sight is legal to use in most shooting and hunting situations. The BUSHNELL HOLOsight has no magnification.

BATTERIES

Depending on the model, your Holosight is powered by either (2) N alkaline 1.5 V batteries or (2)

AAbatteries. An initial set of batteries comes with your sight. The BUSHNELL HOLOsight is designed to maintain constant brightness at a particular setting. The reticle brightness will not fade gradually as the batteries run down but rather shut down abruptly. The first indication of the batteries draining is the reticle blinking when the unit is turned on. Another indication of low batteries is the reticle pattern blinking off and on during recoil. With high recoil guns, this can occur before the battery check indicates low battery condition. If the reticle pattern blinks off and on during recoil or turns off suddenly, replace the batteries. Alkaline batteries from different manufacturers are not all constructed the same way. Tests show some brands are more susceptible to degradation by the shock of recoil.

REPLACING BATTERIES

Remove the battery compartment by lifting up on the locking cam lever and carefully sliding the battery compartment away and up from the sight housing (Figure 2). After the battery compartment is removed, slide the batteries out and replace them with a fresh set. The labels on the bottom of battery compartment show the correct battery orientation. To re-install the battery compartment, point the sight towards the ground and slide battery compartment onto base. Make sure there is enough clearance between the contact and the batteries to avoid bending the contacts. Hold the battery compartment down firmly against the base and close the locking cam. Before you push down on the cam lever, make sure the battery compartment sits all the way down and parallel to the base. Verify correct battery installation immediately by turning on the sight and checking if the holographic reticle appears.

Directions to

Remove & Install Cam Lever

Battery Compartment

FIGURE 2

Tab on Base Battery Compartment

2 3