Any advice before I open my Exa 1a to see if I can put a drop or two of oil on the shutter mechanism? I bought it today because I wanted the chimney finder and Meyer Domiplan that were mounted on it.
Only 60 and X speed work properly most of the time.
On the fast speeds, the mirror barely gets out of the way of the closing shutter, so only a horizontal slit is visible. On 30 (and sometimes 60 and X), the mirror gets out of the way in plenty of time but the closing shutter fails to overcome the latching mechanism and the slit hangs open at the top, failing to close. This doesn't happen when the camera is pointed down.
Now to me this indicates that neither part of the shutter is moving fast enough to do its job, which as nothing else seems to be wrong, seems like a job for a little lubricant. I have previously lubricated some simple shutters (Argus C3, back shutter on pacemaker speed graphic) as well as the mirror mechanism on several Canon A series SLR's, which had the famous Canon squeal. I used brass instrument valve and rotor oil as I was told that it was roughly equivalent to what a lot of repairmen used to use in a pinch, and I applied it in very small amounts with the tip of a sewing needle or a fine-grade hypodermic and syringe.
Anything to consider with disassembly or lubrication? Or am I off base in assuming that this may fix the problem?
Only 60 and X speed work properly most of the time.
On the fast speeds, the mirror barely gets out of the way of the closing shutter, so only a horizontal slit is visible. On 30 (and sometimes 60 and X), the mirror gets out of the way in plenty of time but the closing shutter fails to overcome the latching mechanism and the slit hangs open at the top, failing to close. This doesn't happen when the camera is pointed down.
Now to me this indicates that neither part of the shutter is moving fast enough to do its job, which as nothing else seems to be wrong, seems like a job for a little lubricant. I have previously lubricated some simple shutters (Argus C3, back shutter on pacemaker speed graphic) as well as the mirror mechanism on several Canon A series SLR's, which had the famous Canon squeal. I used brass instrument valve and rotor oil as I was told that it was roughly equivalent to what a lot of repairmen used to use in a pinch, and I applied it in very small amounts with the tip of a sewing needle or a fine-grade hypodermic and syringe.
Anything to consider with disassembly or lubrication? Or am I off base in assuming that this may fix the problem?