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The Leupold GX-5i
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rangefinder emits a series of invisible, infrared energy pulses that
are reflected off the selected target back to the optical unit. State-of-the-art circuitry
and precision computing circuits are used to calculate the distance instantaneously
by measuring the time it takes for each pulse to travel from the GX rangefinder to the
object and back.
Surface texture, color, size, and shape of the target all affect reflectivity, which in turn
affects the maximum range of the instrument. As a rule of thumb, brightly colored tar-
gets are much more reflective than darker targets, with black being the least reflective
color. A shiny surface is more reflective than a dull surface. Smaller targets are more
difficult to range than larger targets. Light conditions, haze, fog, rain, and other envi-
ronmental conditions can all affect ranging performance. Any factor which degrades
air clarity will reduce the maximum effective range. Bright light shining directly on
the lenses reduces the effectiveness, producing shorter maximum ranges than those
possible on darker (overcast) days. The steadier the GX unit is held, the greater the
maximum distance.
How it Works
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