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Twin tube night vision goggles Diana TT are universal devices for night vision. They are designed for individual night observation with no magnification and full field of view wider than 50°. Using them, low-illuminated and low-contrasting objects can be found, recognized and identified. The goggles operate in the conditions of natural night illumination because the illumination source for the object is the emission of the night sky and is in the close IR range of the spectrumThe observation with the device could be implemented to a facemask, helmet or manually. The distance of observation with the goggles depends on the level of the night illumination, the transparency of the atmosphere and the contrast between the background and the target.Optionally, the goggles can be provided with two different a-focal magnifiers. Mounted in front of the objective they turn the Diana TT into a night binocular with magnification 3x and 4x and full field of view wider than 10° and 7°.