An anomaly...

An anomaly...

Hi everyone.

Here's something interesting that was discovered after separately developing
two rolls of 35mm T-Max film: a type of apparent exposure outside of the
sprocket holes, starting at the beginning of the roll and tapering off in
intensity and width, disappearing completely after about frame 10. They are
about 2-3/4" (7cm) apart from center to center, a length of approximately
1-3/4" (45mm) and a width (from edge of film toward sprocket holes of 1/4"
(6.5mm) at frame 0.

Does anyone have suggestions for why this appeared? If it were a light leak
(both rolls exposed in the same camera, a Canon A-1 with light seals intact
and in good condition), I would think the anomaly would exhibit itself
throughout the entire roll, not stopping 1/3 of the way through.

The lack of unwanted exposure throughout the width of the film (i.e. on the
edges only) fails to support a hypothesis whereby a source of radiation was
in proximity to the film.

Any help in solving this mystery would be greatly appreciated. Note that the
use of Excedrin, while instrumental in relieving me of the headache (caused
by too much thought on the matter), has done nothing to solve the quandary
at hand.

--
Yours very truly,
Darin Heinz
Melbourne, Florida USA

Re: An anomaly...

Darin Heinz wrote:
> Hi everyone.
>
> Here's something interesting that was discovered after separately developing
> two rolls of 35mm T-Max film: a type of apparent exposure outside of the
> sprocket holes, starting at the beginning of the roll and tapering off in
> intensity and width, disappearing completely after about frame 10. They are
> about 2-3/4" (7cm) apart from center to center, a length of approximately
> 1-3/4" (45mm) and a width (from edge of film toward sprocket holes of 1/4"
> (6.5mm) at frame 0.

As a guess, the thing that comes to my mind is a light leak in the cassette.
Make sure the felt is not damaged.

Another possibility, though less likely is a light leak in the rim of the tank.


Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson,com N3OWJ/4X1GM

Re: An anomaly...


"Darin Heinz" <spacecoastphoto@hotmail,com > wrote in message
news:481d6bd8$0$4080$4c368faf@roadrunner,com ...
> Hi everyone.
>
> Here's something interesting that was discovered after separately
> developing
> two rolls of 35mm T-Max film: a type of apparent exposure outside of the
> sprocket holes, starting at the beginning of the roll and tapering off in
> intensity and width, disappearing completely after about frame 10. They
> are
> about 2-3/4" (7cm) apart from center to center, a length of approximately
> 1-3/4" (45mm) and a width (from edge of film toward sprocket holes of 1/4"
> (6.5mm) at frame 0.
>
> Does anyone have suggestions for why this appeared? If it were a light
> leak
> (both rolls exposed in the same camera, a Canon A-1 with light seals
> intact
> and in good condition), I would think the anomaly would exhibit itself
> throughout the entire roll, not stopping 1/3 of the way through.
>
> The lack of unwanted exposure throughout the width of the film (i.e. on
> the
> edges only) fails to support a hypothesis whereby a source of radiation
> was
> in proximity to the film.
>
> Any help in solving this mystery would be greatly appreciated. Note that
> the
> use of Excedrin, while instrumental in relieving me of the headache
> (caused
> by too much thought on the matter), has done nothing to solve the quandary
> at hand.

Take those rolls and re-fix in new, fresh fixer for ten minutes.