Another thing. I looks like the actual timing mechanism does not have any viable way to correct the timing. Looks like a simplified Nikon F self-timer mechanism. Just no adjustment. Looks like the only real way to know what shutter speeds are is to buy a cheapo EBAY shutter-speed tester, and mark the dial according to that. I'm also amazed this shutter has no setting for 1 second. They give you 2, 5, 10, 25, 50 T and B, and that's it.