The new Leupold RX-1200i Series digital laser rangefinder is a revolutionary, range-finding device that incorporates advanced digital electronics with state-of-the-art ballistics algorithms. The next generation Digitally eNhanced AccuracyTM (DNA®) engine incorporates additional signal processing techniques to generate better ranging distance with more accurate rangefinding. All RX-1200i rangefinders feature an incredibly bright OLED display with three user selectable reticles and intensity settings, while the RX-1200i TBR adds an inclinometer, Last Target Mode and True Ballistic Range (TBR) functionality. TBR® algorithms were developed by the same engineers who developed Sierra Infinity® Exterior Ballistics Software and who helped develop navigation and guidance systems for ICBMs and other missiles with far more demanding trajectory requirements than a hunting bullet. TBR is a marriage of laser ranging, an inclinometer, and an advanced computerized ballistics program. The result is distance measurements accurate to less than a yard, no matter the angle at which the laser is fired. Bullets and arrows travel in a ballistic arc, yet conventional rangefinders only provide a linear distance to your target. TBR delivers the ballistic equivalent range to the target, accounting for the effects of inclines or declines on the path of your bullet or arrow. Other features that are provided for firearms are outputs that display either MOA adjustments, or inches / centimeters / mils of holdover at that specific distance. TBR eliminates any potentially significant error, and provides a precise range for your aiming calculations. TBR is matched to each of seven firearm ballistics groups or archery ballistics, allowing use with most popular hunting cartridges and bows.
The RX-1200i and 1200i TBR are top-quality 6x22mm monoculars that incorporate the additional benefit of a state-of-the-art laser rangefinder capable of measuring the distance of a deer-sized animal from 5 yards to 800 yards, an inanimate object from 5 yards to 900 yards, and a reflective target from 5 yards to 1,200 yards. It 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, in yards or meters, by measuring the time it takes for each pulse to travel from the rangefinder to the object and back.
One must remember that 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 targets are much more reflective than darker targets. Tan game coats are more reflective than a black roof. 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 environmental conditions can all affect ranging performance. Any factor that degrades air clarity will reduce the maximum effective range. The sun generates infrared energy that can degrade ranging performance in bright conditions or when ranging towards the sun.
The RX-1200i TBR allows the user to select from one of the following mode settings, TBR, BOW, or LOS. TBR calculates the equivalent horizontal range, from which you can determine the correct aim for the conditions and it functions out to 800 yards. Within TBR are functions that inform the user of how much scope adjustment or holdover is required for the shot. The available functions are BAS, HOLD, MIL, and MOA. BAS will display the equivalent horizontal range, based off of your selected ballistic group. This is the range you will want to use when shooting, rather than the line of sight distance, which may contain gross errors depending upon the shot angle. HOLD will display the appropriate amount of holdover to use and weather to hold high or low. MIL will display the appropriate amount of holdover in milliradians. MOA will show the minute-of-angle adjustment for your target and inform you if you need to dial up or down. Finally, the TRIG function is included to support engineers and sportsman alike by displaying the true horizontal range and true vertical range. Have you ever wondered if that leaning tree would hit your home or tent if it fell? The Leupold RX-1200i with TBR will tell you.
TBR includes ballistics settings for seven cartridge groups, based on long range trajectories, and are specifically formulated for the four functions of TBR. For example, if your cartridge type is in Group A, the displayed reading will account for the shot angle and provide the proper distance for holdover purposes. You must choose one of the seven groups, based on your cartridge and ballistics information. TBR performance groups organize load performance in a way that generally provides less than 2.5 inches (1/2 minute of angle) of error in aiming out to 500 yards. Leupold cartridge tables show a common assortment of factory loads organized in their TBR performance groups. If you are shooting a similar bullet weight and muzzle velocity that falls into the provided selections, you can use that cartridge group with full confidence. To see into what group your cartridge falls, you can visit the Leupold web site at www.leupold.com.
For archers, BOW mode works with TBR to provide the equivalent horizontal range for arrows. The displayed range represents the ballistically equivalent horizontal distance to the target if the target is 125 yards or less. If the target is farther than 125 yards, the LOS icon will flash while BOW remains displayed, and resulting distance will be the line of sight distance only.
For those that just want to know how far away something is there is the LOS mode, or Line of Sight. This mode, when activated, provides the straight line distance to the target without accounting for shot angle or specific ballistics.
Rounding out the list of features within the RX-1200i TBR is Last Target mode. This mode is used to display the distance to the farthest object when more than one object may be read. Multiple objects will often return an average distance. Last Target mode ensures an accurate reading on the farthest object.
So the next time you find yourself needing a new rangefinder, head on out to your local Sportsman’s Warehouse and ask to see the Leupold RX-1200i series of rangefinders.