Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,908   Posts: 1,556,124   Online: 1292
      
Results 1 to 6 of 6

Thread: Pinhole Fstop

  1. #1
    Rlibersky's Avatar
    Join Date
    Apr 2005
    Location
    St Paul MN
    Shooter
    8x10 Format
    Posts
    777
    Images
    12

    Pinhole Fstop

    What is the optimum f-stop for a pinhole?

    I looking for an opinion on what is the best pinhole f-stop.

    I have a f-stop of ~356 or F16-10. Would a larger aperture be better? This is about a, if I remember correctly, about a 8 0r 16 second exposure on a bright sunny day. 100ASA film.

    The picture I got is soft but acceptable for a contact print. I have not seen a lot of pinhole print other then in magazines so I have noting to compare it to.

    Randy

  2. #2

    Join Date
    Dec 2005
    Shooter
    Pinhole
    Posts
    64
    That depends on the format and the pinhole-to-film distance. There's a formula for calculating the ideal. The aperture you cite works best for a 225mm focal length.

  3. #3
    Rlibersky's Avatar
    Join Date
    Apr 2005
    Location
    St Paul MN
    Shooter
    8x10 Format
    Posts
    777
    Images
    12
    Really, I thought it was the actual f-stop that mattered.

    My pinhole to film distance is 330 mm or 13 inches. Do you have a link to the formula you are talking about?

  4. #4

    Join Date
    Oct 2005
    Location
    Pakistan
    Shooter
    Multi Format
    Posts
    266
    see

    http://www.stanford.edu/%7Ecpatton/pinhole.html

    for general information, and look for the calculator.

  5. #5

    Join Date
    Aug 2005
    Location
    East Marion, NY, USA
    Shooter
    Multi Format
    Posts
    348
    Free pinhole designer desktop app:

    http://www.pinhole.cz/en/pinholedesigner/
    "What drives man to create is the compulsion to, just once in his life, comprehend and record the pure, unadorned, unvarnished truth. Not some of it; all of it."

    - Fred Picker

  6. #6

    Join Date
    Feb 2003
    Location
    Floriduh
    Shooter
    35mm
    Posts
    2,272
    Images
    2
    Try this, it's simple. http://www.mrpinhole.com/calcpinh.php



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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