Alpha Optics AO-1251/1351 NV Monocular

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Alpha Optics AO-1251/1351 Multiporpose Night Vision Monocular

Key Features:

- Compact, rugged design

- Head or helmet mountable for hands-free usage

- Weapon mountable

- Waterproof

- Built-in IR illuminator

- Bright light cutoff

- IR ON indicator, Low battery indicator

- Ergonomic, simple, easy to operate control

- Adaptable for use with cameras

- Manual gain control (optional)

- Hard waterproof case included

PDF icon Download Spec Sheet (637.95 KB)
Magnification 1x standard; 3x, 5x – optional
Image Intensifier TubeGen 2+ or Gen 3
Field of View51°
Lens System19 mm; F/1.26
Focus Range0.25 m to infinity
Diopter Adjustmentfrom -6 to +2
Automatic Brightness ControlNO
Battery TypeOne 1.5 V AA battery or CR123
Battery LifeUp to 40 hours
Operating Temperature-40°C to +50°C
Storage Temperature-50°C to +50°C
Enviromental RatingIPX8
Dimensions (L x W x H)109 x 48 x 73 mm
Weight310 g


The Alpha Optics AO-1251/1351 is a multi-purpose night vision monocular. It can be handheld, head mounted, helmet mounted, or weapon mounted allowing hands-free operations. Build-in IR illuminator and flood lens improve vision in complete darkness. With a wide 51-degree field of view, this device offers enhanced situational awareness without moving the optic. The AO-1251/1351 uses advanced multi-coated optics and is built to last with a compact composite housing.


Perfect Balance of Size and Performance. Built with a tough, ergonomic composite housing. Needing only a single AA battery or one CR123 battery for convenient operation, can run up to 40 hours.


Packed with Features for a Versatile and Customizable Viewing Experience