Results 1 to 7 of 7

Thread: Exposure compensation for Reciprocity Failure

  1. #1

    Exposure compensation for Reciprocity Failure

    Hello everybody
    First of all, i will apologize since surely i will say a lot or rubbish since i am a digital guy trying to make his way through film nowadays (panoramic 617).

    I was just wondering one thing: If you use a modern light meter (sekonic, for instance), can you introduce (program) directly into the meter the reciprocity failure law given by the fabricant of the film you use?

    I have discovered that film fabricants provide the "law" of compensation depending on the exposure time, i was just wondering if you need to make the calculations mentally when using light meters or whether you can introduce those laws into the machine so that it gives you the correct exposition already "corrected".

    As i said before, surely my question will be no sense at all... but i had to ask.

    Thanks very much in advance!!!
    Rafael
    Switzerland

  2. #2

    Join Date
    Sep 1998
    Location
    Oregon and Austria
    Posts
    2,009

    Re: Exposure compensation for Reciprocity Failure

    I am not aware of a light meter that is able to be programmed to compensate for reciprocity failure. Most of us refer to a table to determine the adjusted exposure. There are many online and in manufacturers' literature. You don't have to do the calculations in your head, but you will need to carry a table for each film you use.

    Best and good luck,

    Doremus Scudder

  3. #3

    Join Date
    Dec 1997
    Location
    Baraboo, Wisconsin
    Posts
    7,695

    Re: Exposure compensation for Reciprocity Failure

    I'm not aware of a light meter that automatically takes reciprocity failure into account but IIRC the BTZS expo-dev program for the Palm Pilot sold in the U.S. by The View Camera Store does this (and a lot of other things as well). But the expo-dev program would be an expensive purchase if you used it only for that purpose. Much less expensive just to carry around a table of reciprocity-adjusted exposure times for the film you're using.
    Brian Ellis
    Before you criticize someone, walk a mile in their shoes. That way when you do criticize them you'll be
    a mile away and you'll have their shoes.

  4. #4

    Join Date
    Mar 2005
    Posts
    109

    Re: Exposure compensation for Reciprocity Failure

    Since I use a Windows Mobile PDA and can't find a program similar to the BTZS one that works on it, I just have the charts in spreadsheets for the films I use and then use the calculator.

  5. #5

    Re: Exposure compensation for Reciprocity Failure

    Thanks very much for the info
    That means the traditional method will do very well

    Thanks again
    Rafael

  6. #6
    Greg Lockrey's Avatar
    Join Date
    Jun 2006
    Location
    Temperance, MI
    Posts
    1,959

    Re: Exposure compensation for Reciprocity Failure

    There is a program that you can download that's called Pinhole Designer that has a function to calculate reciprocity for various named films. We pinholers deal with this sort of thing all the time. http://www.pinhole.cz/en/pinholedesigner/
    Greg Lockrey

    Wealth is a state of mind.
    Money is just a tool.
    Happiness is pedaling +25mph on a smooth road.



  7. #7

    Join Date
    May 2005
    Location
    Portland, OR
    Posts
    540

    Re: Exposure compensation for Reciprocity Failure

    I carry a small notebook with all of the various reciprocity charts, and do the math in my head. It's low tech, but the batteries never run out.

    --Gary

Similar Threads

  1. instant film exposure compensation
    By thedeep in forum Darkroom: Film, Processing & Printing
    Replies: 1
    Last Post: 26-Dec-2007, 10:29
  2. fp4+ reciprocity failure (and a short question about pre exposure)
    By false_Aesthetic in forum Darkroom: Film, Processing & Printing
    Replies: 16
    Last Post: 4-Sep-2006, 17:11
  3. Conundrum: exposure compensation for rise?
    By Leigh Perry in forum Style & Technique
    Replies: 21
    Last Post: 29-May-2004, 05:19
  4. exposure of dark evergreen trees?
    By Bill Glickman in forum Style & Technique
    Replies: 23
    Last Post: 8-Sep-2001, 05:33
  5. Exposure compensation for telephoto lenses?
    By Bill Glickman in forum Lenses & Lens Accessories
    Replies: 15
    Last Post: 13-Jun-2000, 04:17

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •