Originally Posted by Larry H-L
By “shaking” I mean a gentle wiggle with the camera at different angles.
The Nikon S2 rangefinder is a bit sensitive to "shaking" and little bumps (it is designed not to break and to get out of adjustment quite easily, which is good because even a strong bump won't break it) so I really advise you not to play the shaking game for the sake of nothing.
Another thing you can do easily without taking anything apart, and which might provide some good results :
- remove the camera back and any attached lens,
- set the shutter speed on "T",
- cock the shutter, fire it, the shutter will stay open,
- you will see the focusing helical from the rear, through the shutter gate,
- focus to minimum focusing distance : this will let you see a good part of the focusing threads,
- with something soaked in lighter fluid (avoid something which will leave cloth fibers behind : you can, for instance, make a small ball of kitchen wiping paper which you will hold using a small pair of tweezers or a wood pick thanks to some adhesive), you will clean the visible part of the focusing helical threads until you get the feeling it's clean enough (a small, clean brush with a long stick will be useful to achieve the job as well).
Once done, you will also, using a syringe, drop some tiny amounts of lighter fluid in there, so that it gets into the focusing threads, before actuating back and forth the focusing helical several times.
Then you will set the shutter speeds on "1" so that the shutter closes.