Horizontal Distance (THD) is the range you should base your shot
upon.
For example, a bowhunter in a tree stand may be aiming at a deer that
is downhill at a -52
relative to his position. The line of sight distance
o
is 32 yards, but he is likely to "overshoot" the target based on that.
The THD distance (compensated for the angle) reads 19.7 yards. That
is the distance the hunter should base his shot upon.
CLEANING AND GENERAL CARE
The lenses of your Bushnell Bone Collector 850 laser rangefinder are multi-coated for highest light transmission. As with any
multi-coated optics, special care must be taken in cleaning the lenses. Follow these tips for proper lens cleaning:
• Blow away any dust or debris on the lens (or use a soft lens brush).
• To remove dirt or finger prints, clean with the supplied micro-fiber cloth rubbing in a circular motion. Use of a coarse cloth
or unnecessary rubbing may scratch the lens surface and eventually cause permanent damage. The included washable
microfiber cleaning cloth is ideal for the routine cleaning of your optics. Simply breathe lightly on the lens to provide a slight
amount of moisture, then gently rub the lens with the microfiber cloth.
• For a more thorough cleaning, photographic lens tissue and photographic-type lens cleaning fluid or isopropyl alcohol may
be used. Always apply the fluid to the cleaning cloth – never directly on the lens.
The rangefinder is manufactured and tested to withstand water exposure up to IPX4 standards. It is water resistant, but should
not be submerged.
TROUBLESHOOTING
Never disassemble your laser rangefinder. Irreparable damage can result from unauthorized service attempts, which
also void the warranty.
If unit does not turn on, display does not illuminate:
• Depress Power/Fire button.
• Check and if necessary, replace battery. If unit does not respond to button presses, replace the battery with a good
quality CR2 3-volt Lithium battery.
If unit powers down (display goes blank when attempting to power the laser):
• The battery is either weak or low quality. Replace the battery with a new 3 -volt lithium battery (CR2).
If target range cannot be obtained:
• Make sure the display is illuminated.
• Make sure that the Power/Fire button is being depressed.
• Make sure that nothing, such as your hand or finger, is blocking the lenses at the front of the rangefinder that emit and
receive the laser pulses.
• Make sure unit is held steady while depressing Power/Fire button.
NOTE: The last range reading does not need to be cleared before ranging another target. Simply aim at the new target using
the display reticle, depress the power button and hold until new range reading is displayed.
Technical Specifications
LB850SBL
6x 24mm
202209
6x 24mm
4
850/777
500/457
850/777
500/457
Line of Sight = 32Y
Degree of Angle = -52°
Compensated Distance = 19.7Y
350/320
+/- 1 yd
350/320
+/- 1 yd
BOW
MODE
52°
Multicoated
4.3/110
Multicoated
4.3/110
32 Yards
Line of Sight
19.7 Yards
True Distance
6.3/180
6.3/180