[rollei_list] Re: Neopan 400 in Ultrafin
- From: Laurence Cuffe <cuffe@xxxxxxx>
- To: "rollei_list@xxxxxxxxxxxxx" <rollei_list@xxxxxxxxxxxxx>
- Date: Tue, 19 Aug 2014 08:29:20 +0100
You could be right about five leaves and an oil drop. Another hint might be t
see if the location and shape of the patern was confined to the exposed frame.
That would also point towards a shutter fault
Laurence Cuffe
Sent from my iPad
> On 19 Aug 2014, at 00:24, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
>
> Hi Laurence:
> A five leaves shutter with an oil drop affecting
> two or three or four or five leaves could cause some strange effects
> on the exposure. Anyway, the emulsion does not look good indeed,
> perhaps you are right.
> ISO 400 films are more sensitive to X rays than ISO 50 or ISO 100.
> films. I lost the first three frames during a travel to Brazil in the
> '90s due to X rays in the airport, I did not know at the time about
> the way X rays affected the films in the airports ; it was an ISO 400
> film and the X rays fogged the three first usable frames, X rays are
> widely used today, including land freight transport.
>
> Carlos
>
> 2014-08-18 18:30 GMT-03:00 Laurence Cuffe <cuffe@xxxxxxx>:
>> Hi Carlos,
>> I can easily see bands forming from a failing focal plane shutter, however
>> looking at the pattern on the cows picture the only way I can see it
>> happening from a faulty leaf shutter is if there was a pinhole from the
>> centre of the focal plane shutter closing improperly, it might result in
>> another image being placed on the film while the camera was resting. The "X
>> shaped pattern which I see as a filled X and a Chevron of stray light on the
>> film rather than increased exposure seems to be out of focus, and so I would
>> be inclined to blame it on something which happened to the film out of the
>> camera.
>> All the best
>> Laurence Cuffe
>>
>> Sent from QCloud
>>
>>
>> On Aug 18, 2014, at 09:35 PM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
>>
>> 2014-08-18 16:52 GMT-03:00 Chris Burck <chris.burck@xxxxxxxxx >:
>>> Wavy streaks??? I see a very distinct geometric pattern, roughly
>> equivalent
>>> to. . . x‹ . I wouldn't expect something like that to result from
>> chemical
>>> or mechanical anomalies during processing. It seems to my mind to
>> be more
>>> indicative of some sort of irregularity during exposure, or
>> possibly even a
>>> "pre-fogging" of some sort during manufacturing.
>>
>> Jan:
>> I tend to agree with Chris through my own experience. I had a
>> similar situation with the Rollei SL66 due to uneven shutter working
>> during the exposure and it was the main reason I sent it for CLA last
>> year. Some shots started to show bands of different density and the
>> number of shots showing the problem were increasing, the pattern were
>> bands because we are talking about a focal plane shutter; the TLR has
>> a leaf central shutter and it could be the cause for the distinct
>> pattern, it could have to do with the shutter speed too. It looks like
>> the shutter leaves don't open and don't close using the same speed.
>> This is an opinion based on my experience, as I wrote above, but I
>> could be wrong for your case, I don't know.
>>
>> Carlos
>> PS: Nice shots BTW.
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