Since the little knob thing for the shutter fell off my other Zenit 'tank', I splashed out and bought another for the price of a large Mocha [last of the big spenders!]. I screwed in the Helios lens from the other one and shot a roll of cheap colour film just to see what it would do. All seems ok apart from the variable focusing. Is this the fault of my 'expensive' body [the camera, not mine] or it it the lens or compatibility of the two. Would welcome your thoughts.