Field of view

SR-19:36°(H) × 27°(V), with 19mm lens

SR-35:20°(H) × 15°(V), with 35mm lens

SR-50:14°(H) × 10°(V), with 50mm lens

SR-100:7°(H) × 5°(V), with 100mm lens

Lenses not interchangeable. Lens must be specified at time of order.

Spatial resolution (IFOV)

SR-19:2.0mrad, SR-35:1.1mrad,

SR-50:0.8mrad, SR-100:0.4mrad,

Thermal sensitivity

85mk (25)

Image frequency*

7.5Hz(NTSC) or 8.3HZ(PAL)*

Focus 

SR-19,SR-35,SR-50:Fixed; SR-100:Manual

Electronic zoom

2×

Image processing

Automatic Gain Control(AGC), Digital Detail Enhancement(DDE)