NSP-3
The NSP-3 is a night vision device of Soviet origin. Unlike the earlier NSP-2, the NSP-3 is a passive device using a cascade tube. Inside the device (presumably) is a U-32M three-stage cascade tube. The device weighs around 2.7kg. It has a magnification of 2.7x and a field of view of 7°. The device runs on a 4.5 volt accumulator. The whole kit including the bag, crate and accessories weighs around 7.8kg. There are two variants of the device, the NSP-3 and NSP-3A. The NSP-3 carries the 1PN27 GRAU index catalogue number, while the NSP-3As number is 1PN28.[1]
NSZP-3
The device was license produced in Poland and Hungary. The Polish version of the device carries the same NSP-3 designation of the soviet variant, while Hungarian devices are called NSzP-3 (these use U-32M tubes).[2]
