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Thread: Rodenstock calculator

  1. #11

    Join Date
    Dec 1997
    Location
    Baraboo, Wisconsin
    Posts
    7,697

    Rodenstock calculator

    Once you determine the bellows extension difference between focusing on the nearest point and the farthest point in the scene you can use published tables to determine the necessary aperture without buying a depth of field calculator. Linhof publishes such tables and others were published in Photo Techniques magazine a while back (I believe these tables are cited in Tuan's focusing article in this home page). I'm sure they've been published elsewhere. The Linhof tables are based on an 8x10 print and if you decide to stop down one stop more than the tables call for with 4x5 (e.g. if you want to be on the safe side or if you think you'll be printing larger than 8x10) they are particularly easy to use because the necessary aperture corresponds exactly to the bellows extension difference. E.g. if the extension is 1.6 mm or close to it, the tables say to use F16; if the extension is 2.2 mm or close to it, the tables say to use F 22, if the extension is 3.2 or close to it the table say to use F 32, and so forth up the aperture scale. So you don't need to carry anything around with you. Of course all of these tables (and, I assume, the Rodenstock depth of field calculator) have to make assumptions about the size of the circle of confusion that is acceptable to you.
    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.

  2. #12

    Rodenstock calculator

    AFAIK the Rodenstock calculator is -- at least officially -- not available any m ore ('cause of the logo).

    Alex

  3. #13

    Join Date
    Sep 1998
    Location
    Loganville , GA
    Posts
    14,409

    Rodenstock calculator

    "AFAIK the Rodenstock calculator is -- at least officially -- not available any more ('cause of the logo). "

    We have lots in stock if anyone has a dealer in the U.S. who wants some. They will be available for quite some time here.

  4. #14

    Join Date
    Jan 2004
    Location
    New Jersey, USA
    Posts
    4

    Rodenstock calculator

    Re: Rodenstock Calculator - I use it all the time and it works very well, especially fo Scheimpflug adjustments. My field camera, a Linhof TKS 45, has an angle scale on the front and rear standards, so following the calculator is easy. However, I'd like to suggest the calculator to others who do not have angle scales on their standards. What can they use in the field to accuately measure the angle of tilt?

    Thank you, in advance.

    DF Connors www.dfconnors.com

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