Generation

2.3x42 Waterproof Gen 1 Night Vision

Starlight technology night vision devices have their amplification and feature specifications categorized into generations, which were originally defined by the US Military. Official generation specs exist for generations 1 through 3, gen 1 being the oldest and lowest technology. Some manufacturers also offer "generation 4" devices that outperform gen 3, but there is not a corresponding military definition for gen 4. Also available for starlight technology is digital night vision which performs between gen 1 and gen 2 but can also be used in daylight. Thermal night vision is also available. Unlike starlight technology, thermal sees in the far infrared and can detect differences in temperature. For a more in-depth discussion see the Night Vision portion of our Learn About Optics section