Steffen_Muc
Hello newsgroup,
I developed my first roll of Efke IR820 film today and, unfortunately, there’s practically nothing on it. When taking the photos, I used a Heliopan IR715 filter; I calculated the exposure time for ISO 10 and always did overexposure and underexposure by one stop, so I did a bracketed exposure series. I developed the film at 20°C in Rodinal 1+25 for 9 minutes; I agitated it for the first minute, then three times every minute thereafter. On the negatives, there’s a faint hint of sunlight visible twice, but nothing else. Is this down to the exposure or the development? Does anyone have any tips for me? I’d be grateful for your help!
Best regards,
Steffen
Tandemfahren
Hi Steffen,
Apart from your rather unconventional choice of developer (Rodinal reduces the speed of most films) – there really ought to be something ‘on it’. Your Rodinal has gone off too, haha.
What do the edge markings look like? Bold black and legible? – then more light! Or faint? – then develop longer, or optionally switch to a different developer, such as A49 or Microphen.
Don’t forget, the 715 is a strong filter, and depending on the subject, there might be very little left. What you’re measuring there is interpreted by the exposure meter for panchromatic material, and the 3 or perhaps 10 ISO doesn’t really have the desired real-world relevance.
Did you have the sun in the frame? If it’s only faintly visible, you should really take exposure brackets in 2-stop increments and start a good 3–4 stops higher.
If your image concept allows it, a different filter (645, 665, 695) can of course also help, as these let through a small visible portion of the spectrum and increase the usable speed.
Good luck and plenty of good light
Frank
Tandemfahren
Hi, this might be of some help to you – at least the diagram.
http://www.laborpartner.info/de_downloads/Infrarot.pdf
Is that it?
Frank
