The FS-12 is a very similar kit to the FS-3, with updated components. The camera body is a Zenit 12S; this photosniper therefore has the marked advantage over the FS-3 of through-the-lens metering. It was again supplied in an enamelled steel suitcase, with the the updated Helios 44 - a Helios-44M4 (or 44M5 or 44M6) 58 mm f/2 - and Tair-3AS 300 mm f/4.5 tele lens.