TiMo
I’ve had quite good results with the film mentioned above in 120 format. I expose it at ISO 6 or 3 depending on the situation and usually get very usable results.
Yesterday I tried the film in 4x5 format. Same procedure as with the 120. The film was stored in the fridge and has a shelf life of another year. All the pictures except one look as shown in the attachment (the bright circular spot is the light source from the ceiling lamp, not a subject on the film). The only picture that turned out better was one I took a few weeks ago. However, it also has very low contrast.
I also shot some CHS 50 yesterday and that came out perfectly. So it’s not down to the lens.
Does anyone know what the reason might be?
Cheers, Tim
piu58
> Does anyone know what the reason might be?
Films that have been heavily exposed to light (over decades) look like this. Or material that has been damaged by chemical agents, particularly hydrogen sulphide.
TiMo
I received the film about eight weeks ago. Since then, it has been stored in a cool place and, of course, has not been exposed to any hydrogen sulphide. And as I said, the expiry date is 10/2013.
Tandemfahren
Hi, just to rule out the most obvious mistake first: is it the same filter as on the MF, or the same or a similar one?
It almost looks like a cassette slide has been exposed / the lid is still on / the shutter is broken!
Next, I’d try exposing an IR film without an IR filter to see if anything happens.
Best regards
TiMo
Hello Frank.
The same filter was used. I can rule out any lens defects. Four different lenses were used, and the photos on the CHS50 turned out well.
I’ve just done another test. I performed an exposure on two more rolls of film. Without a filter at ASA 100. One roll from the old pack and one from a pack that hadn’t been opened yet.
Both films were then developed together with the CHS 50. The development time was 1 minute shorter for the IR, but of course something should still be visible. However, both films show the same grey as in the photo above. Not the slightest detail of the subject is visible.
Unless there is something very important about handling IR sheet films that I am unaware of, I can safely assume that the films are ruined.
Best regards
piu58
Why don't you try developing an unexposed sheet? IR films are sensitive; who knows what might have happened.
TiMo
Hello Uwe,
The results of your suggestion can be seen below.
As always, the sheets were loaded in the evening in an unlit room, inside a light-proof bag. They were stored in the fridge, in their original packaging with an additional light-proof bag around them.
The left-hand leaf is from the pack I opened especially for these tests. I’ve had this pack for a few months.
The right-hand leaf is the first leaf from a pack I received the day before yesterday.
Interestingly, the divider sheets are also different. In the good pack they are black, in the bad one they are white.
Thanks and best regards,
Tim
TiMo
The Impex team has been very accommodating in this matter.
We would like to take this opportunity to thank them for that.
