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Has anyone else had this issue?


Revdockj

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I recently got a 75mm summicron for my M8 and sometimes (only once in a while) when I focus up close (around it's limit), the framelines slightly move as I release the shutter. Weird! Anyone else had this happen?

 

Ken

 

Hi Ken,

 

Does anything rattle when you gently shake your camera, or have you dropped it by chance? It's perfectly normal for the framelines to move as you focus close-up, but I wouldn't expect them to move as you release the shutter, unless you are moving the focus at the same time. :confused:

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If you focus around (or just beyond) the limit it is not impossible that the roller and the lens loose contact in which case the rangefinder mechanism might be able to shift a bit further under the influence of the shutter vibration. The rangefinder patch shifts to the right and down as you focus closer - so that would explain it.

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I recently got a 75mm summicron for my M8 and sometimes (only once in a while) when I focus up close (around it's limit), the framelines slightly move as I release the shutter. Weird! Anyone else had this happen?

 

Ken

 

Hi Ken,

happens all the time with my cam, not sure though if it's only related to the 75'cron.

When I release the shutter the frame lines seem to 'jump'. First I became a little annoyed and thought for the worst, but now after 2,5 years I doesn't bother me anymore. Besides I developed more quirks myself than my cam has :D

 

Kind regards.

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Just tried this about a dozen times: no movement of the framelines at all - but sometimes I realize, that i don't keep the camera steady when i release the shutter, so i get some movement of the image i have in the viewfinder.

 

Did you try it on a tripod with a cable release to eliminate movements of the camera?

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Thanks, All,

Yes, the camera was in a case and slipped to the floor from the back of a chair (only about a foot or two above a hardwood floor). Maybe that jolted it enough. The movement of the frames is slightly downward and to the right. And I have only noticed it since using the 75mm lens and only at the closest of ranges. Weird. It doesn't seem to have any effect upon sharpness of the photo or anything.

Bart, do the frames "jump" for you all the time or just occasionally?

 

Ken

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"If you focus around (or just beyond) the limit it is not impossible that the roller and the lens loose contact in which case the rangefinder mechanism might be able to shift a bit further under the influence of the shutter vibration. The rangefinder patch shifts to the right and down as you focus closer - so that would explain it."

 

The M8 rangefinder will focus only to within about 24 inches, yet some lenses (not sure about your 70 mm) can focus closer than this - at which time the rangefinder roller and lens may lose contact, as noted above. In such instances (I have seen this in the 21 mm Elmarit in a focus test, but not on longer lenses) the rangefinder will say the image is in focus but the lense can be focused closer and the recorded image (f stop not withstanding) will be OF.

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Ken,

 

That is parallax correction. the viewfinder frame marks are compensating for the fact that the lens is about 2 inches to the right of the window, this would cause your image to be cropped wrongly unless the frames moves. so the camera use the focus distance to adjust the correct position of the marks for that distance.

 

.

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Thanks, All,

Yes, the camera was in a case and slipped to the floor from the back of a chair (only about a foot or two above a hardwood floor). Maybe that jolted it enough. The movement of the frames is slightly downward and to the right. And I have only noticed it since using the 75mm lens and only at the closest of ranges. Weird. It doesn't seem to have any effect upon sharpness of the photo or anything.

Bart, do the frames "jump" for you all the time or just occasionally?

 

Ken

 

Just occasinally, Ken.

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