The only differences between this camera and the Zenit-4 are the labeling and the standard lens. The Rubin-1 zoom lens was available as an accessory for the Zenit-4 but standard on the Zenit-6. The Zenit-6 came in a large black leather case which had no markings. The camera fit in the case with the lens down. The case had a compartment on each side for accessories. There were a yellow and an orange filter, a cable release, a lens cap, an accessory shoe and a waist level finder provided as standard accessories. Voigtlander Bessamatic lense are compatible.