Archived posting to the Leica Users Group, 2001/08/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Or the M6 needs to be designed around a high-speed coreless motor and a quartz shutter. But I guess someone already did that. John Collier wrote: > The problem is not with the drive but with the camera. It needs to have > mechanism that allows the motor to move after the shutter has completed its > cycle, and, prevents the shutter from firing until it has finished winding, > adjusted. This is a very common problem which results in all sorts of > shenanigans: cameras locking up, uneven exposures, etc. The M camera needs > to be redesigned with a simple electric interlock rather than a mechanical > one. > > John Collier > > > From: Andrew Nemeth <azn@nemeng.com> > > > > A while back I reported that motorised sequences taken with > > the new Compact M Motor would smear the left hand side of > > shots following #1 in the sequence. > > > > Finally had some time to test this and can confirm that yes, > > it's a real problem at all shutter speeds when you have the > > motor set to the quiet(er) "I" setting. > > > > What appears to happen is that the shutter opens prior to the > > low-tourque-wind film has fully coming to rest, resulting in > > the LHS side of the frame being motion blurred. The proprortion > > of the frame ruined of course varies with the s/speed. At 1/250th > > only @ 1/8th of the frame is ruined. At 1/125th almost a third > > of the image gets smeared. > > > > However, set the motor to the louder & faster "II" setting and > > the smearing is gone, at all s/speeds. Here because there is > > no low-tourque monkeying about, the film is in place and > > stationary when the shutter curtain opens. > > > > So the moral of the story is: use "I" for one-off frames and > > stick to "II" for sequences. > >