Description
The National Geographic 4x21 Laser Rangefinder is very easy to use, has a large measurement range, high quality optical system and small size.
- Magnification: 4x
- Lens diameter, mm: 21
- Field of view, m/1000 m: 142
- Viewing angle (°): 8.00
- Exit pupil diameter: 5.25
- Aperture: 27.56
- Twilight Factor: 9.61
- Exit pupil distance (mm): 20.40
- Focus: Fixed focus
- Lenses: multi-coated
- Measurement range: 4m-800m
- Measurement method: 905nm/25W semiconductor laser (eye safe)
- Power supply: 6F22 9V battery (purchased separately)
- Overall dimensions (mm): 113x88x42mm
- Weight: 201 g
The National Geographic 4x21 is a splash-proof monocular laser rangefinder with 4x magnification, a 21mm objective lens and a viewing angle of 140m/1000m (8°). The rangefinder is very easy to operate and takes measurements instantly. The measurement range is from 4 to 800 meters. The measurement accuracy is +/- 1m, depending on the shape and surface of the object and weather conditions (rain, fog). Distances can be measured in "meters" or "yards". The measurement scale is displayed on the built-in LCD display.
Measurements are carried out in several modes
- Standard - for measurements under normal illumination, up to 155 meters
- RAIN - for measurements in rain or bad weather, up to 20m
- REFL - for measurements in fog, up to 30 meters
- >155 - for measurements at distances greater than 155m.
