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Author Message   Glenn Middleton Rating: N/A Votes: 0 Posted on Tuesday, July 19, 2005 - 11:09 am:    Any instructions that mention tensioning the curtain rollers by 4.5 turns, are assuming that you are setting the shutter up after a complete stripdown. To INCREASE the tension in an otherwise working camera, you do it by half or even quarter turn increments. You cannot rush the job. When set correctly the movement of each curtain has a distinct and different sound. The second curtain must move more slowly than the first. Set camera on B, you will hear what I mean if tension is correct. I set the shutters of my Zorki 1 specials by sound alone, it is both easy and accurate. When you remove the bottom plate there are some gearwheels meshed to the sprocket shaft(two on Zorki 1). Make sure that there is no dirt or film debris in the teeth of these gearwheels. Lube with a drop of suitable oil, Nyoil, gun oil or similar.