The Mir ("Peace or World" in Russian) was a lower cost version of the Zorki 4, primarily for domestic consumption. Standard lens was the rigid Industar 50, collapsible I-22 or the Jupiter 8. Costs were reduced by eliminating the slow speed shutter mechanism. Some claim at least some Mirs have the 1/1000 shutter speed, but it isn't shown on the dial. The Mir is allegedly one of the most reliable Soviet cameras because it isn't complicated by the slow speed shutter train. An early Mir cameras had the frame around the viewfinder and rangefinder windows - like the early Zorki 4s and were covered with vulcanite .