truls
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Post by truls on May 24, 2013 3:11:29 GMT -5
Some images turns out black on the right side of the image, might be some shutter problem? If it is light leaks pics would have been white due to excessive light. Example images with special characteristics:   |
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mickeyobe
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Post by mickeyobe on May 24, 2013 10:42:19 GMT -5
How about a loose aperture blade?
Mickey
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Stephen
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Post by Stephen on May 24, 2013 12:01:00 GMT -5
It does not look like a focal plane shutter edge, more like the camera case! Most shutter blind faults show with a sharp defined edge, as it is near the film focus plane.
Aperture blades are possible, but usually are completely out of focus, as the blades are at the centre of the cone. a loose blade would just cause a loss of light... in theory.
It may well be the case or gloves, or a scarf in the picture area.
Stephen.
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Post by julio1fer on May 24, 2013 18:42:08 GMT -5
There is a gradation left to right, besides the blacked out area. I'd look for uneven shutter travel, especially in the cold.
External objects, as Stephen said, is also a possibility, what bothers me is the gradation of tones.
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truls
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Post by truls on May 25, 2013 5:54:53 GMT -5
julio1fer is right, images are fading in gradiation, but only outside... Here another example, image darkens at the right side:  Inside the house image looks normal:  I saw the mirror bumper looked strange, have replaced it, will test more today. I really like the Spotmatic, a most easy and silent camera, only needed controls are present. I use the smallest kind of hearing aid battery (PR312), as the normal hearing ais battery is to big to fit. |
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Stephen
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Post by Stephen on May 25, 2013 10:55:46 GMT -5
If the mirror bumper was slowing up the mirror before the correct final parked position, it may apply pressure via the raising mechanism in the shutter, on the first blind, slowing it up. I am no expert on the Pentax design, but this seems logical. It would give these symptoms. Add a bit of cold, and you may have the answer.
Stephen.
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casualcollector
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Post by casualcollector on May 25, 2013 22:42:37 GMT -5
Not sure how the curtain brake works on a Spot but I think that may be where your problem is. I have three Fujicas and all do the same thing your Pentax is doing. 2nd curtain bounces back or doesn't close all the way. Another possibility is the light seal at the hinge of the film door.
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Stephen
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Post by Stephen on May 26, 2013 6:49:13 GMT -5
It should not be light seals, as it would be white streaks on the prints due to light leak, so I think that can be eliminated from the possibilities. A general service of the shutter should cure the issue. Pentax cloth shutters are as reliable as any make, and share traditional layout with most.
Stephen.
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mickeyobe
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Post by mickeyobe on May 26, 2013 9:53:58 GMT -5
Truls,
Could you not put a piece of ground glass or a suitable substitute on the film plane and watch through the open back to see if you can observe what might be the cause?
You might also try holding the camera upside down and vertically, each side on the bottom as you release the shutter at various speeds.
My two cents is still on a loose aperture blade. The shadow appears on outdoor shots in very bright light when the aperture should be stopped well down.
Mickey
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Post by julio1fer on May 26, 2013 18:29:14 GMT -5
It could well be, did you use another lens in those outdoor shots?
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