Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,975   Posts: 1,523,639   Online: 1091
      
Results 1 to 4 of 4
  1. #1
    Bobby Ironsights's Avatar
    Join Date
    Oct 2007
    Location
    Thunder Bay, ON, Canada
    Shooter
    35mm
    Posts
    123
    Images
    6

    Flash TTL doesn't work properly with B&W?

    The T90 was the first Canon camera to support through-the-lens (TTL) flash metering. This measured the actual light levels reaching the film by measuring reflected light off the film (OTF), shutting down the flash unit once the film is sufficiently exposed. The measurement is calculated using the average reflectivity of color negative film. This system was also used on Canon's new EOS system, making the T90 the only non-EOS Canon body compatible with TTL Canon flashes[6].

    Hmm. I never really new how the flash ttl worked, I guess the different reflectivity of B&W film changes how the film is exposed with black and white? I haven't had alot of experience with flash use, but I plan on it.

  2. #2

    Join Date
    Feb 2008
    Shooter
    4x5 Format
    Posts
    171
    it seems to work just fine on my Nikon.

  3. #3
    Ed Sukach's Avatar
    Join Date
    Nov 2002
    Location
    Ipswich, Massachusetts, USA
    Shooter
    Medium Format
    Posts
    4,520
    Images
    26
    Be careful you do not confuse Off-The-Film (OTF) with Through-The-Lens. OTF will be affected by film reflectivity; TTL will not.
    Hasselblad's ProFlash was designed to operate with their 503Cx (OTF) system. and in the manual for its operation, they list compensations for the reflectivity of various films. Unfortunately, many of the films listed are no longer available, and many new films are not listed, so one must establish their own particular "tweak" factor.

    I've used both TTL and OTF (Olympus OM is OTF) and I would choose OTF, without question - worth the extra effort.

    TF syystemst g
    Carpe erratum!!

    Ed Sukach, FFP.

  4. #4
    Christopher Walrath's Avatar
    Join Date
    Dec 2005
    Location
    Milton, DE, USA
    Shooter
    4x5 Format
    Posts
    6,980
    Blog Entries
    29
    Images
    19
    Light is light. Color and B&W have had the same results with my exposures (when I'm not rushing it and totally screwing it up). What exact problems are you having, Bobby?
    Thank you.
    CWalrath
    APUG BLIND PRINT EXCHANGE
    DE Darkroom

    "Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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