JohnSaves
Hello,
I accidentally exposed a Bergger BRF400+ at ISO 100.
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Now the question is: how do I develop the film to get the maximum sharpness and contrast out of it?
For the developer, I have a choice of Kodak D76, Adox Rodinal and Adox Atomal. I’d prefer to develop in Atomal or D76.?
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The following times are specified for the film with standard exposure (20°C):
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D76 (1+1) 11 mins?
Rodinal (1+50) 13 mins?
Atomal ?
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What times would you recommend?
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Regards,
Johannes
ThomasPauly
To minimise the risk, I would only pull by one stop. If I reverse the rule of thumb for pushing (extend by a factor of 1.3 per stop), this gives, for example, 11 mins for D-76 (1+1) divided by 1.3, i.e. approx. 8.5 mins. The negatives will still have some degree of overexposure, but this is within the tolerance for negative film. In the final enlargement, the loss of quality should be minimal; at most, the sharpness might have suffered slightly due to the excessive exposure and the correspondingly higher light scatter within the emulsion layer. However, there’s nothing that pulling can do about that anyway.
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Regards
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tepe
JohnSaves
OK, thanks a lot – I’ll give that a go then...
JohnSaves
This is all getting even more exciting :-)
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I thought the film had been exposed at ISO 100, as my Leica automatically sets the exposure to ISO 100 if the DX code isn’t readable.
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Since the film cartridge isn’t DX-coded but is completely white, it seems an incorrect DX value was read after all. Completely white = ISO 5000.
This was also displayed in the rangefinder – but I thought it was an error message.
So now:
The film doesn’t need to be pulled from ISO 400 to ISO 100, but pushed to ISO 5000...
Morte
If you then divide it by two and multiply it by the date of the next lunar eclipse, you might be able to spot some aliens.
MirkoBoeddecker
ISO 5000?
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The DX system doesn’t work based on colour but on contact (bare metal vs. coating).
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Check that again. If you’ve had significant exposure above 800 ISO, you shouldn’t expect any usable results.
