andyturk
Established
I noticed a very curious thing today while trying to figure out whether the focusing patch on my R-D1 was vertically aligned: on the first exposure after moving the focus ring on a lens, the patch will jump slightly as the shutter is pressed. The movement seems to be in the same direction as the last turn of the focus ring.
I tried this on two different lenses (75/2 Summicron and 21/2.8 Elmarit) with repeatable results in both cases. The movement is slight, but clearly visible through the viewfinder. If I wind and take another shot without moving the focus ring, the patch stays put. It's as if some slack in the rangefinder linkage is taken up by the first impulse of the shutter mechanism opening and closing.
Has anyone else seen this?
I tried this on two different lenses (75/2 Summicron and 21/2.8 Elmarit) with repeatable results in both cases. The movement is slight, but clearly visible through the viewfinder. If I wind and take another shot without moving the focus ring, the patch stays put. It's as if some slack in the rangefinder linkage is taken up by the first impulse of the shutter mechanism opening and closing.
Has anyone else seen this?
jlw
Rangefinder camera pedant
I haven't noticed this -- but someone else who sent in an R-D 1 to DAG reported his finding that some cameras have a small amount of "lash" in the RF coupling (lash, to oversimplify a bit, is clearance between reciprocating parts) and that this can cause slack in the RF coupler when you reverse the direction of the focusing ring. In other words, when you stop turning the ring in one direction and turn it the other way, the RF patch stops moving briefly until the focusing cam's movement "takes up the lash" in the new direction.
(I've seen this in other RF cameras, too, and I suspect that ALL of them have some amount of lash, even if too small to be perceptible -- moving parts always need some amount of clearance! I suspect it has come up in connection with the R-D 1 because we're scrutinizing the rangefinders so closely.)
It certainly seems plausible that in your particular camera, there's enough lash that the shutter vibration takes it up and causes the visible movement. Seems as if it would have to be pretty loose for this to happen, though -- wonder if you ought to try to have something done about it, on the chance that the looseness might get worse and impair focusing accuracy...?
(I've seen this in other RF cameras, too, and I suspect that ALL of them have some amount of lash, even if too small to be perceptible -- moving parts always need some amount of clearance! I suspect it has come up in connection with the R-D 1 because we're scrutinizing the rangefinders so closely.)
It certainly seems plausible that in your particular camera, there's enough lash that the shutter vibration takes it up and causes the visible movement. Seems as if it would have to be pretty loose for this to happen, though -- wonder if you ought to try to have something done about it, on the chance that the looseness might get worse and impair focusing accuracy...?
andyturk
Established
Do you think it's a fixable problem or something that requires replacement?jlw said:
fgianni
Trainee Amateur
andyturk said:
If you can accurately focus then I'd say dont bother doing anything about it, otherwise send your camera to Epson for replacement and hope the next one is better.
agoglanian
Reconnected.
you know, mine does the exact same thing! i was figuring it just does that??
whatever it is, it doesnt seem to be affecting the ability to focus the camera because i can still get tack sharp images..
so until it actually causes a problem, im not going to worry about it
whatever it is, it doesnt seem to be affecting the ability to focus the camera because i can still get tack sharp images..
so until it actually causes a problem, im not going to worry about it
agoglanian
Reconnected.
oddly enough, it is now the framelines that move when i press the shutter. but they always seem to go back into place.