Very Rare R-HELIOS-100 2.5/100 mm, Russian KMZ lens

A reproduction lens that did not have a focusing device. Intended for photographing screens of electron beam devices. Aperture limits: 2.5-16.

There was also a modification "R-Helios-100-OS" (1979-1981), used in the photographic attachment "FP-1", as well as "Foton-OS" (a special camera for monitoring the video channel of television systems, as well as for filming from the screen oscilloscopes), along with the Signal-2 1.4/85 lens.

Resolution (center/field) - 15/15.