| Author | Message | ||
     Rick_oleson Tinkerer Username: Rick_oleson Post Number: 1228 Registered: 07-2006 Rating: N/A |
There is some facility for adjustment of the slow speeds (1-15 and 60), but I think your point about how often you will use these speeds, and even more, how important critical accuracy is at these speeds, is very much on the mark. The faster speeds are more important, and there is no relation between the fast and slow control systems in the Zorki. You do not need any speed to exactly correspond to its theoretical duration. What you do need is, first and foremost, for the 2 curtains to be traveling at the same velocity, and secondly, for the speeds to step in a reasonable approximation of a 1-stop sequence from each setting to the next. I see that you're already familiar with the CRT tester method at http://rick_oleson.tripod.com/index-135.html . Although it does not give a numerical readout, it is very precise. Leica used to provide their technicians with a mechanical shutter tester that worked in exactly this way. A small black & white TV picked up cheaply at a flea market is a good investment as a shutter tester, even though it's now quite useless as a television. |