Binoculars Kahles Helia RF 10x42 LK1 20033
The lightweight and ergonomic HELIA 42 RF perfectly combines brilliant optics with reliable targeting up to 1,200 m on common hunting targets (deer, tree). It stands out for intuitive simple handling and useful hunting features like patented EAC (Enhanced Angle Compensation) and scan mode.
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Binoculars Kahles Helia RF 10x42 LK1 20033
Product Highlights:
Easy and reliable targeting up to 1,200 m on common hunting targets
Intuitive simple menu navigation
Patented EAC-function (Enhanced Angle Compensation) for angle correction
Long-range (LR) function for ranging easy to detect targets up to 3,600 m
Premium-quality OLED display with five manual brightness settings and display in meter or yards
Scan Mode, temperature and air pressure display
Extra long battery lifetime ~ 4,000 measurements
Technical data:
Model: Kahles Helia RF 10×42
Magnification, x: 10
Objective lens diameter, mm: 42
Interpupillary distance, mm: 58–72
Field of view, degrees: 6.1°
Apparent field of view, degrees: 59°
Closest focusing distance, m: 10
Diopter compensation, dpt: ±4
Measuring range, m: 10–1500
Measuring accuracy, m: ±1 up to 100 m, ±2 up to 1000 m, ±0.5% above 1000 m
Display type: OLED
Brightness levels: 5
Measurement speed, s: 1
Automatic display shut-off, s: 15
Eyecup adjustment positions: 4
Waterproof (nitrogen-filled): Yes
Measurement units: Meters/yards
Laser class: 1M
Single measurement mode: Yes
Scanning measurement mode: Yes
Angle compensation: EAC function
Battery type: CR2 Lithium (3V DC)
Battery life: 4000 measurements
Mechanical operating temperature, °C: from –25 to +55
Electronic operating temperature, °C: from –10 to +55
Dimensions (L×W×H), mm: 148 × 131 × 71
Field of view at 1000 m, m: 107
Temperature measurement: Yes
Air pressure measurement: Yes
Weight, g: 880
Size, mm: 148 × 131 × 71
EAC Feature:
Assume the distance from the target is 400 m
Assume an angle of 40°
Rifleman's rule result: 306 m
EAC function result: 321 m

As the example shows, the distance determined by the EAC function differs from that of the rifleman's rule by 15 m, a distance which, depending on calibre, projectile, barrel length, etc. can already have a significant impact on the accuracy of a shot.