Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,209   Posts: 1,531,976   Online: 1159
      
Results 1 to 10 of 10
  1. #1
    wiseowl's Avatar
    Join Date
    Sep 2003
    Location
    S Wales
    Shooter
    4x5 Format
    Posts
    423
    Images
    3

    HP5 in Rodinal = thin negs?

    Tried HP5 in Rodinal today for the first time, the results are somewhat dissapointing and I'm hoping for a a little insight. From a visual inspection I'd say the film is about 1 stop underexposed. ie The highlights are thin and shadows have no detail whatsoever.

    The film was shot over a period of about 1 week, metering was with a proven Weston and I've experienced no problems with the camera. I rated the film at 400 iso. Processing was rodinal 1 + 50 @ 20C for 11 minutes (I got the time from digitaltruth.)

    Could this be down to old dev, my rodinal is somewhat dark I used it because I've been given the impression that it has a great shelf life? Or would increasing dev time improve shadow detail as well as highlight density?

    Has anyone any experience of this combo, if so could you suggest times/ei ratings.

    As always, thanks in advance

    Martin

  2. #2

    Join Date
    Jul 2004
    Shooter
    Multi Format
    Posts
    3,042
    Hi Martin,

    As luck would have it I have just finished developing 3 rolls of 35mm HP5+ rated at 400 in Rodinal 1+50.

    After the first roll which I developed at 20C for 15 minutes was a little dense but just kept in the highlight details, I settled on 14 minutes for the final 2 rolls. Both are still drying but look spot on and full of detail

    BTW I have found Rodinal seems to work better once it has turned brown.

    HTH Tony

  3. #3
    Les McLean's Avatar
    Join Date
    Oct 2002
    Location
    Northern England on the Scottish border
    Shooter
    Multi Format
    Posts
    1,610
    If there is no detail in the shadows the problem is not enough exposure. How did you meter? Old Rodinal is OK no matter how dark it is, there was a thread recently about the longevity and some of us have used it up to 10 years old.
    "Digital circuits are made from analogue parts"
    Fourtune Cookie-Brooklyn May 2006

    Website: www.lesmcleanphotography.com

  4. #4
    glbeas's Avatar
    Join Date
    Sep 2002
    Location
    Roswell, Ga. USA
    Shooter
    Multi Format
    Posts
    3,307
    Images
    109
    I've read that Rodinal is one of those developers the give a loss of film speed to the combo. I shoot my Ektapan at EI 80 instead of the rated 100 to get the best results. I've noticed other films look a bit thin and should have been exposed more if I'd thought about it. Do some bracketing and see what EI give the best results for you.
    Gary Beasley

  5. #5
    wiseowl's Avatar
    Join Date
    Sep 2003
    Location
    S Wales
    Shooter
    4x5 Format
    Posts
    423
    Images
    3
    Thanks for the very prompt replies and for putting my at rest about the Rodinal.

    Les, some frames I considered to be average and metered reflected light, others I used an invercone. The film's density overall is very similer, which to me points to a consistent error, either at the exposing or processing stage.

    Could you advise as to the best course of action, my normal approach would be to shoot several frames at different iso settings and develop as normal, in this case 200, 320 and 400 and then evaluate the negs.

    Thanks

    Martin

  6. #6
    Les McLean's Avatar
    Join Date
    Oct 2002
    Location
    Northern England on the Scottish border
    Shooter
    Multi Format
    Posts
    1,610
    Quote Originally Posted by wiseowl
    Thanks for the very prompt replies and for putting my at rest about the Rodinal.

    Les, some frames I considered to be average and metered reflected light, others I used an invercone. The film's density overall is very similer, which to me points to a consistent error, either at the exposing or processing stage.

    Could you advise as to the best course of action, my normal approach would be to shoot several frames at different iso settings and develop as normal, in this case 200, 320 and 400 and then evaluate the negs.

    Thanks

    Martin
    My first piece of advice would be to avoid using an invercone when exposing black and white film, I have three Weston meters, all redundant, but I threw away the invercone for all of them, I think they are a waste of time for black and white photography. First of all every meter is calibrated to an 18% grey card which means that it thinks that everything it reads is mid grey. To give the correct exposure you need to adjust the camera settings after making the light meter reading. So, when you meter a dark shadow and want it to be very dark you close down the lens by up to three stops, two stops to see detail in there and one stop to see very good detail in there. I close down the lens only one stop, in effect placing my shadows on Zone IV in zone system terms. I would suggest that you read the reflected light from two specific areas of the image, the shadow and the highlight. Expose for the shadow as described, the reason for metering the highlight is to determine the contrast range of the subject to determine development. Normal contrast range is up to 5 stops which means normal development, minus contrast range in 3 stops which means plus development and plus contrast means more than 5 stops which requires minus development. I would rate the film at 400 ISO. I hope this helps, if not please ask some more questions.
    "Digital circuits are made from analogue parts"
    Fourtune Cookie-Brooklyn May 2006

    Website: www.lesmcleanphotography.com

  7. #7
    wiseowl's Avatar
    Join Date
    Sep 2003
    Location
    S Wales
    Shooter
    4x5 Format
    Posts
    423
    Images
    3
    Thanks again Les. Looks like I'll have to chalk this one up to sloppy metering technique and thanks for the advice.

    Martin

  8. #8
    titrisol's Avatar
    Join Date
    Aug 2004
    Location
    Rotterdam
    Shooter
    Multi Format
    Posts
    1,671
    Images
    8
    HP5 can be rated @400 in Rodinal 1+50.
    I give it 9 min @24C
    Mama took my APX away.....

  9. #9

    Join Date
    May 2004
    Location
    Florida
    Shooter
    Pinhole
    Posts
    141
    Images
    7
    Quote Originally Posted by wiseowl
    Thanks again Les. Looks like I'll have to chalk this one up to sloppy metering technique and thanks for the advice.

    Martin
    Before blaming the under exposure on sloppy metering you might try doing personal film speed and developement time tests whenever you change developer/film combinations.

  10. #10
    wiseowl's Avatar
    Join Date
    Sep 2003
    Location
    S Wales
    Shooter
    4x5 Format
    Posts
    423
    Images
    3
    Thanks, I'll give it another try at 400 first. I definitely was a little cavalier with the metering. I'm a little concerned that I didn't manage to get 1 right out of 12, but at least their consistently off.
    If the next one turns out similarly I'll have to reconsider my options.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin