The ND-3x40 SZ is part of the new Subzero™ line of products. Smaller and lighter than the ND-3x50 SZ, but more powerful than the ND-3 SZ the ND-3x40 Subzero™ model easily mounts to your rifle or scope and will deliver reliable illumination night after night.
The patented Rotary Optical Collimator uses a system of 9 fully multi-coated lenses that allows full adjustment and control of the beam diameter and intensity to focus light where you need it most. Rotating the collimator to minimum, it creates a bright micro beam of green laser light visible up to 3 miles. Rotating the collimator to more open settings provides plenty of illumination to light a trail at night or pin-point targets at up to 400 yards.
ND-3x40 Subzero™ is specifically designed to operate in subzero temperatures without loss of intensity or power. For a professional who spends most of their missions or operations in colder climates of 40 degrees or below, then the ND-3x40 Subzero™ is for you. However for anyone who will be using a Laser Designator in warmer climates of 40 degrees or above, our recommendation is to get the standard ND-5® or ND-3® series.
Research shows that green light is the most visible to the human eye (See Chart) and requires the least amount of eye adjustment at night. An eye that has adapted to daytime conditions generally has a maximum sensitivity around 555nm. Compared to the color red which optical spectrum is around 630 – 650nm our eye is closer to the Green region of the optical spectrum at 510 - 530nm.
Hunting and Wildlife Observation: -Allows wildlife viewing at long distance.
Laser beam is visible up to 3 miles providing pin point rescue location
Beam diameter is easily adjusted to be a light source for night hiking.