The 2.5-10x42 ERi Riflescope from Leica fuses a weather-sealed housing and high-transmission lens system with a range of shooter-friendly features that help make this optic well-suited for close and mid-range targeting. Leica employs a 30mm optical path and multicoated lenses to transmit a clear image that has crisp detail and impressive brightness even during twilight hours. Complementing its optical performance, the ERi has a 4" eye relief and a 2.5-10x zoom range, making the ERi both versatile and practical.

This ERi riflescope model is configured with Leica's illuminated 4A reticle, a general purpose pattern that has a fine crosshair centered on three medium-weight posts at three, six, and nine o'clock. The 2.5-10x42 ERi also has low-profile capped windage and elevation turrets that make impact point corrections in 0.1 mil increments. Leica's reticle illumination system has nine brightness settings controlled by a dedicated side turret.

To preserve battery life, the ERi features two automatic deactivation functions; one that turns off the illuminated aiming point after three minutes, the other uses a built-in sensor to determine when the rifle-mounted scope is raised or lowered from the firing position. Once the rifle is returned to a relatively level position (±70°), the red dot is immediately re-activated to the previously used brightness setting.

In addition to the image quality and functionality of the ERi riflescope, its nitrogen-filled aluminum housing is built for reliable performance in heavy rain, extreme humidity, and rapid temperature changes. Exposed lens surfaces are coated with AquaDura, a water-repellent layer that helps moisture roll off the lens surface and prevent occluding the scope's objective or eyepiece.



2.5-10x magnification

42mm objective

4" eye relief

German 4A reticle in 2nd plane

0.1 mil impact point correction

Low-profile capped windage and elevation turrets

Auto-Off function disables illuminator when tilted beyond ±70°

Dedicated reticle illumination turret

9 reticle brightness levels

30mm tube diameter, aluminum construction

Nitrogen-filled fogproof and waterproof

AquaDura moisture-repellant lens coating

Knurled windage / elevation adjustment dials

12.75" length

18.3 oz weight



Magnification 2.5 - 10.0x

Objective Lens Diameter 42 mm

Main-Tube Diameter 1.2" (30 mm)

Reticle Illuminated 4A

Field of View 44 - 12 ft (13.4 - 3.7 m) at 100 yd

Parallax Correction 109 yd (100 m)

Eye Relief 4" (100 mm)

Exit Pupil Diameter 14 - 4.2 mm

Diopter Adjustment -4 to 3

Filter Size M 46 x 0.75 mm

Impact Point Correction 0.1 mil

Maximum Windage/Elevation Adjustment Not specified by manufacturer

Weatherproofing Nitrogen-filled

Watertight 13 ft (4 m)

Power Supply (1) 2032 battery

Runtime Not specified by manufacturer

Dimensions 12.75" (32 cm)

Weight 18.3 oz (520 g)

Leica 2.5-10x42 ERi Riflescope (4A)

  • Product Code: Leica 2.5-10x42 ERi Riflescope (4A)
  • Availability: In Stock
  • R14,969.00

Tags: Leica 2.5-10x42 ERi Riflescope (4A)