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  1. #1
    stradibarrius's Avatar
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    Adox CMS 20 and Rodinal???

    Who processes CMS 20 in Rodinal? I wanted to use a 1+50 dilution but the massive development chart does not show it.
    I have just shot my first roll and want to process it in Rodinal.
    "Generalizations are made because they are generally true"
    Flicker http://www.flickr.com/photos/stradibarrius
    website: http://www.dudleyviolins.com
    Barry
    Monroe, GA

  2. #2

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    Adotech, the special developer for this film, is based on phenidone derivate.I believe the oxidation products of this inhibit development and give near normal contrast at the box speed of ISO 20.
    With Rodinal the method of controlling the contrast is to greatly overexpose and develop in dilute solution.I did get a result using EI=3 (three) and developing for 15m 68F agitating every 2 min, this in 1:200 dilution.
    Using higher EI loses shadow detail.

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    Hi Barry,
    The 2 images You mentioned in the other thread are developed in Adolux APH09 that is based on the recipes of the original Rodinal formulation from 1918.
    For the film roll with the image "Hands" I shot it @ 10 ASA developer's dilution was 1:100 and develped for 15min @ 20° C / 68 °F 2 agitate for a minute then 2 gentle/slow inversions every 2 minutes. The CMS 20 in fresh fixer needs about 1 minute. The lens was 20mm f/5,6 Russar MR-2 stopped 1 step from wide open at f/8 + yellow 1 or light orange filter..
    For the film roll with those images "Rangefinder round the Church" I shot it @ 12 ASA, developer's dilution was 1:300 for 28min agitation for 1 minute then 2 slow inversions @ 26,25,24,23,22min then 2 slow inversions @ 20,18,16,14,12min then 2 slow inversions @ 8,4min. The lens was 1939 Elmar 50mm f/3.5 stopped at f/4,5 + light yellow filter.
    I usually use distilled water for the chemicals and washing, Jobo plastic tank.

    George
    Regards,
    Georg

  4. #4
    stradibarrius's Avatar
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    If I use rodinal 1 + 100 for 18 min., as the massive development chart suggest, is there a minimum amount of Rodinal needed in the dilution. If I process one roll Of CMS 20, it takes 500 ml to process one roll of film in my tank. At a 1 + 100 dilution that would only be 5 ml of Rodinal to the 500 ml of water. Is 5 ml enough of the Rodinal?
    Some one on Flicker told me that there was a thread here at APUG where someone shot CMS 20 and used Rodinal 1+50 for 11 min. and got great results?? I can't find the thread.
    "Generalizations are made because they are generally true"
    Flicker http://www.flickr.com/photos/stradibarrius
    website: http://www.dudleyviolins.com
    Barry
    Monroe, GA

  5. #5

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    The image "Rangefinder round the Church" from my gallery was developed with 4 ml of Rodinal in 1,200 ml distilled water for 28min @ 20° C / 68 °F... I used only 400ml from those 1,200ml.
    Agitation is a very important factor, especially with Adox CMS20! In my experience 1:50 might work if the scenes You shot were of very very low contrast. If You could "sacrifice" the 1st few frames form the roll, just cut them in the dark room and try them out in 1:50..

    Good luck!
    Regards,
    Georg

  6. #6

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    Barry,
    did You shot it at the box speed? 20 ASA or lower?
    In my case I shot it at 12 ASA, so 1:300 for 28 min might not gonna make it in your case
    Regards,
    Georg

  7. #7
    stradibarrius's Avatar
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    It was shot at 20. Some shots were indoors in my shop and a few were outdoors. I tried to take shots that I have taken before so I would have a basis of comparison.
    I am going to do as you suggested and cut the roll in half process the first in 1+50 and check the results before I process the second half of the roll.
    "Generalizations are made because they are generally true"
    Flicker http://www.flickr.com/photos/stradibarrius
    website: http://www.dudleyviolins.com
    Barry
    Monroe, GA

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    What type of light source You used inside the shop? The CMS 20 is a bit blind for shadows with bluish cast...
    Regards,
    Georg

  9. #9
    stradibarrius's Avatar
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    A couple of the shots were under my studio lights, some were in front of a window with overheard lighting.
    "Generalizations are made because they are generally true"
    Flicker http://www.flickr.com/photos/stradibarrius
    website: http://www.dudleyviolins.com
    Barry
    Monroe, GA

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