Representing the latest advancement in Night Vision optics, the ATN PS40-HPT gives your daytime scope Night Vision capability in a matter of seconds. The ATN PS40-HPT mounts in front of a daytime scope to enable nighttime operation. No shift of impact, no need to rezero nor change of eye relief occurs. The ATN PS40-HPT uses the latest in image intensifier tube technology for outstanding resolution and performance. Precision optical alignment is essential for a front sight system to work properly. This is why each ATN PS40-HPT is individually tested and aligned on an optical scale by our engineers to provide perfect alignment. The ATN PS40-HPT is one of the most compact and lightweight NV systems in its class, at only 840 grams. ATN PS40-HPT Spec Sheet ATN PS40-HPT User Guide ATN PS40-HPT Features: Easily changes daytime scope to Night Vision Mounts in front of daytime scope, no re-zeroing required Multi-coated all-glass optics Fast catadioptic front lens system Large 40 mm eyepiece/output window Lightweight and rugged Comes with Quick Release Mount Optional 7/8" weaver mount Optional Scope Mounting System attaches the PS40 unit to the objective of the day scope (47-50; 56-58.7 mm diameter) Automatic brightness control Limited Two-Year Warranty ATN PS40-HPT Specs: Total Darkness IR System = Yes "SMART" Technology = No IIT Generation = HPT Photocathode Type = Multi - Alkali Resolution = 54-72 lp/mm Signal to noise ratio = 16-24 Figure of merit = 1600 typical Magnification = 1x Lens System = F1:1.44, 80 mm Proshield Lens Coating = Yes FOV = 12° Exit Pupil = 40 mm Range of Focus = 10 m to infinity Diopter Adjustment = No Controls = Direct Remote Control = Yes Automatic Brightness Control = Yes Bright Light Cut-off = Yes Infrared Illuminator = Detachable IR450 (optional) IR Indicator = Yes Low Battery Indicator = Yes Power Supply = 1x1.5 V AA type battery or 1x3 V CR123A type battery Battery Life = 60 hours (3 V) 30 hours (1.5 V) Reticle System = No Windage & Elewation Adjustment = No Environmental Rating = Waterproof MIL-STD-810 = Yes Operating Temperature = -20 to +50°C Storage Temperature = -50 to +50°C Dimensions = 177 x 85 x 83 mm 7.0"x3.4"x3.3" Weight = 0.84 kg / 1.85 lbs Warranty = 2 years ATN PS40-HPT - Day Night Weapon Sight NVDNPS40H0