Now that ADOX CHS 100 II film is available on 120 format (as well as on 135 format and many, many different sizes of sheet film) it is getting really interesting. I have used a lot of ADOX CHS 100 ART on 120 format and loved the results and ADOX CHS 100 II film is said to be just as good. As a medium and large format shooter, I’m really happy that this film is now available in all formats.
ADOX provided a technical sheet for this film here, but crucially, the reciprocity failure correction information was missing. I emailed them, and they kindly obliged and provided me with the following information. I have not been able to verify any of this, I hope that you can let me know how you got on with the information below; it will certainly be a good start:
|Up to 1 second, no correction required.
|2 seconds: 1.5x (3 seconds)
|4 seconds: 2x ( 8 seconds)
|8 seconds: 2.5x (20 seconds)
|15 seconds: 3x (45 seconds)
|30 seconds: 4x (120 seconds)
|60 seconds: 6.5x (6 minutes 30 seconds
In a graph it looks like follows (time metered on the horizontal axis versus the required exposure time on the vertical axis):
See also Howard Bond’s article on reciprocity departure for a really good article on the subject which is also referred to as the Schwarzschild effect.
A few weeks ago I picked up a few rolls of ADOX Color Implosion film and gave it a spin at the Medieval Festival at Vianden Castle last week.
Getting back the negatives from the shop was a bit of a shock: instead of the normal orange colour cast from a colour negative, the negatives were dark red. I scanned them in raw mode and corrected the colour cast by hand, not trusting the software to get decent results when applying its standard filters it uses for normal colour negatives.
As promised the colours were all over the place and it has got lots of toxic grain! Like the web site states, it looks like a cheaply developed film incorrectly stored for 30 years and just found in an attic. No Instagram filter will come close to the results.
I’m chuffed to let you know that ADOX is getting ready to ship ADOX CHS 100 II which they claim will be very close in characteristics to the original ADOX CHS 100 ART and will be available in the full range from 135, 120 to large format except 127 format. Because it is newly developed, it will benefit from new technologies to avoid problems with light piping (no more loading the film in the dark) and a new coating avoiding scratching the emulsion during development. See here for details.
On Monday 22 July, ADOX followed up on their Facebook page with the following statement:
Today CHS 100 II saw the dark of the coating alley. Now it has to settle and harden. After August 15th we can start cutting it up. We hope to keep “August” as a delivery date for the first rolls.
Earlier this week I watched the Hokkaido interview with Michael Kenna again and his work continues to inspire me and I know that his work is very popular on the Net especially since he has been using long exposures for most of his work and long exposures are very popular these days.. I would love to get his book about Hokkaido but $250 is a bit too steep, maybe it is time for a cheap re-release Mr Publisher (please, pretty please?)
Anyway, I started looking at long exposures and the reciprocity failure compensation values for the films I use. I still need some more time experimenting before I get there, but when I was scouting for locations to use around where I live, I came across this small copse that didn’t look too attractive on account of a farm being behind it and a modern shed distracting the view on the other side. But I realized that with my 165mm lens on my Pentax 67II camera, I would be able to crop the photo such that none of these appeared. Not a long exposure of this copse just yet, but certainly a shot I do like.
I guess it is old news for many already but the Efke IR 820 and ADOX CHS films have been discontinued due to a problem in the very old machine that does the coating at Fotokemika in Croatia and it is not economically feasible to repair it. I guess that for infra red film I need to turn to the Rollei film. I’m still contemplating what film to choose as replacement for the ADOX CHS film. The new ADOX Silvermax film that has just been announced at the Photokina 2012 is very temping but will only be released on 135 format, not on 120 format. Otherwise the ADOX Silvermax would have been perfect with its rich silver content and tones. It is rumoured to handle up to 14 zones.
So that is my 35mm requirement taken care of, but 120 roll film is much more important to me. I have had terrible results with Rollei film on 135 format and I find it pretty “hard” and I prefer Fuji Acros for that. I have no experience with Fomapan film, is that something that could take the place of ADOX? Does it handle stand development well?