RE: Re. [Leica] Frame #31 uneven (pictures)

["Don Dory" <dorysrus@mindspring.com>]

Peter,
If you have eliminated the shutter as the cause of this, then it looks
exactly like a roller transport failure in the developer.  My problem is
that most roller transports run two rolls at a time so two rolls with
the same frame number failure point makes sense.  However, the third
roll causes me some head scratching.

This can happen when the leader card is a little beat up and doesn't
catch as it goes over the cross over into the next solution.  Eventually
the card catches but you have over development on the side that remains
in the developer.

Con
dorysrus@mindspring.com

- -----Original Message-----
From: owner-leica-users@mejac.palo-alto.ca.us
[mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of Peter
Klein
Sent: Tuesday, November 25, 2003 12:12 AM
To: leica-users@mejac.palo-alto.ca.us
Subject: Re. [Leica] Frame #31 uneven (pictures)

Here are the pictures.  They are titled "ShutterProb" only because
that's 
what I initially thought the issue was.

http://www2.2alpha.com/~pklein/tofino/1-31ShutterProb.jpg
http://www2.2alpha.com/~pklein/tofino/2-31ShutterProb.jpg
http://www2.2alpha.com/~pklein/tofino/3-31ShutterProb.jpg

- --Peter

At 03:02 PM 11/24/03 -0800, I wrote:

>Folks: Simon's drying marks on his negs reminded me of a mysterious
>problem I had recently.  It happened on three successive rolls of color
>neg film (1 of Supra 400, two of Reala 100), all shot in the same
M6TTL,
>and processed together at the same lab.
>
>On each roll, on frame #31 and *only* frame #31, the right half
>(approximately) of each print was significantly darker than the left
half,
>with a distinct boundary. The brighter half (left) looked correctly
>exposed, the darker half (right) looked underexposed. The boundary
between
>the bright and dark areas was a vertical line, not exactly straight,
but
>nearly so.  All three defective frames were probably *not* taken at the
>same shutter speed, which could have been anywhere between 1/60 and
1/500.
>The unevenness appears on the negatives, too.
>
>I suspected a shutter problem.  But when I talked to Sherry about it,
she
>said that she didn't see how such a thing could be related to a frame
>number.  If all or most pictures taken at a particular shutter speed
were
>uneven, that would indicate a shutter problem.
>
>Since then I've shot several rolls, and the problem has not recurred.
>I've used both the lab where the three problem rolls were developed,
and
>another.  No more uneven frames.
>
>I'm beginning to wonder if the processing is at fault. The only three
>things in common are the camera, the lab, and the time of processing.


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