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11-11-2010, 06:51 PM   #1
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White streaks...

Well, on the CP-7M that I just bought..I have some issues with the pictures I developed..

I developed two rolls and they looked perfect. I then developed two more rolls, and I discovered a small thin white streak in some of the photos.
The streak is on the same elevation but seems to move left or right
between the pictures. And some pictures look totally line free. All four
rolls were different manuf's and ISO's. Also with the same lens.
If I can figure how to attach one of the affected pictures I will...can
anyone suggest if maybe a problem with the lens or the camera itself?

Thanx!

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11-11-2010, 07:20 PM   #2
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Most likely the shutter, given the apperance of the light streak. Probably not the lens, as the lines are vertically aligned (matches a metal shutter curtain). I'd guess it is worn out, or been damaged on some point.

I don't think there is any solution to this, but you could try to look into which particular frames are affected. Mind things like camera settings (esp. shutter speed), time between each exposure, or maybe if flash was used.

(It's too bad, as the CP-7m is an interesting camera. It shouldn't be too expensive to replace, though.)
11-11-2010, 08:49 PM   #3
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Thanx fot the reply..

What is different about these pictures and the rolls before it is that the first
two rolls I shot at a much higher shutter speed.

Well, at least I can fix the pictures. I have programs like Adobe and
Paint Shop Pro..but I find the good old Paint (that comes with Windows)
is faster and better than anything else and soooo much easier to use.

I'm re-posting one that I fixed..

I'll pay more attention to shutter speeds to see if my hypothesis is correct.

Thanks again....
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11-12-2010, 04:27 AM   #4
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Come to think about it, it may be something inside the camera scratching the film at times. Light leaks usually are more 'blotchy'.

I know the CP-7m has a motor drive, which makes it impossible to experiment with winding speeds, but try cleaning the camera inside. Needless to say, avoid chemicals or anything that leaves residue. An air blower ('rocket blower' or an 'ear washer') should be sufficient.

(Other factors could be involved, of course. I would guess some films are just more prone to scratching than others.)

11-12-2010, 08:51 AM   #5
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Those are scratches on the film.
11-12-2010, 10:43 AM   #6
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Yeah, that makes sense to me, too.

Once I am done with the current film roll I will clean the inside
with what you suggested...I read on another site that
you could ue a soft artists's paint brush (new) as well...but I will
try that last...
11-12-2010, 10:56 AM   #7
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If the Chinon is an auto load then have a good look at the pressure guide on the back of the camera that pushed the film onto the take-up spool. Often these have a small idler roller on them which can seize up and scratch the film as it passes.
11-15-2010, 03:21 PM   #8
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Okay. I have had a chance to look at the inside of the camera.

It is an auto-load/auto-rewind camera.

There is a take-up spool which has 2 guide wheels
attached (upper and lower)...

The upper guide wheel is just about where the sratch marks are
located geographically on the pictures. I examined the guide wheel
and it seems to turn smoothly. There are two metal hands that
hold the wheel in place. I believe it is these hands that are ending
up touching the film. Most likely, the inside of the wheel has worn
and it wiggles and moves just enough during the winding process
to allow the endges of the hands to get to the film.

The big question..can it be fixed.....

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