Page 586 of 655 FirstFirst ... 86486536576584585586587588596636 ... LastLast
Results 5,851 to 5,860 of 6544

Thread: Use of X-ray film: technical discussion with example images

  1. #5851
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    22,384

    Re: Use of X-ray film: technical discussion with example images

    Like!

    Pinhole size and duration?

    Quote Originally Posted by Andrew O'Neill View Post
    14x17 Pinhole; Double-sided green latitude. Developed in D-23 1+3

    1417 Pinhole Test Shot by Andrew O'Neill, on Flickr
    Tin Can

  2. #5852
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    5,136

    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by Tin Can View Post
    Like!

    Pinhole size and duration?
    Pinhole size was about 1mm. Focal length was about 500mm. Exposure time was 25 minutes. I didn't bother with reciprocity correction as I didn't feel like standing there for an hour. Still turned out well.

  3. #5853
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    22,384

    Re: Use of X-ray film: technical discussion with example images

    Thanks, I am not having luck with 1 mm pinhole, perhaps my duration is way too short


    Quote Originally Posted by Andrew O'Neill View Post
    Pinhole size was about 1mm. Focal length was about 500mm. Exposure time was 25 minutes. I didn't bother with reciprocity correction as I didn't feel like standing there for an hour. Still turned out well.
    Tin Can

  4. #5854
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    5,136

    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by Tin Can View Post
    Thanks, I am not having luck with 1 mm pinhole, perhaps my duration is way too short
    I'm using mr. pinhole. You can generate an f/stop and exposure chart there. https://www.mrpinhole.com/calcpinh.php

  5. #5855
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    22,384

    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by Andrew O'Neill View Post
    I'm using mr. pinhole. You can generate an f/stop and exposure chart there. https://www.mrpinhole.com/calcpinh.php
    I use him constantly

    I may have the wrong hole in my 1 mm

    I am going to make my own pinholes shortly
    Tin Can

  6. #5856

    Re: Use of X-ray film: technical discussion with example images

    Today three 18x24cm Sinar Norma Lisco holders arrived from Germany. These will hold 18x24cm Kodak Mammography film, going into my 8x10 Sinar Norma

    XRAY is a good way to learn large format handling and procedures.
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
    ― Mark Twain

  7. #5857
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    22,384

    Re: Use of X-ray film: technical discussion with example images

    Perfect!
    Tin Can

  8. #5858

    Re: Use of X-ray film: technical discussion with example images

    Sinar Norma 18x24 Lisco Holders by Nokton48, on Flickr

    Three additional original Sinar Norma era 18x24cm Lisco holders. They came from Germany good deal but no dark slides. Catlabs has replacements at what I thought was a fair price so now cleaning these up to use.

    These will hold 18x24 Kodak single sided Mammography film. I have about 500 sheets in stock so set for a while. The 8x10 Norma grounglass is very accurately marked for use with these holders.

    Sinar Norma 18x24 Lisco Holders XRAY by Nokton48, on Flickr

    As you can see the 18x24cm Mammo XRAY stock fits perfectly in the Norma holder. This will make nice size contact prints. I envision split printing these negs. I got the idea for a contact printing light source that works with the big Multigrade filters. the idea came from Tim Layton and I followed his lead. These negs could benefit from being split-filtered to really nail the tonality.
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
    ― Mark Twain

  9. #5859
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    5,136

    Re: Use of X-ray film: technical discussion with example images

    "Sam"

    14x17 double-sided green. 355mm Meniscus lens with cardboard aperture of about f/11 @ about 1sec. D-23 1+3. 10:00 20C. Flat-bottomed tray with gentle agitation every minute.



    Sam by Andrew O'Neill, on Flickr

  10. #5860
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    22,384

    Re: Use of X-ray film: technical discussion with example images

    Like!

    Quote Originally Posted by Andrew O'Neill View Post
    "Sam"

    14x17 double-sided green. 355mm Meniscus lens with cardboard aperture of about f/11 @ about 1sec. D-23 1+3. 10:00 20C. Flat-bottomed tray with gentle agitation every minute.
    Tin Can

Similar Threads

  1. Technical Pan Film
    By Jehu in forum Darkroom: Film, Processing & Printing
    Replies: 34
    Last Post: 22-Apr-2016, 18:42
  2. Images, not technical discussions.
    By rdenney in forum Image Sharing (Everything Else) & Discussion
    Replies: 0
    Last Post: 23-Jul-2015, 14:16
  3. Replies: 91
    Last Post: 23-Jul-2015, 12:01
  4. T Max 400 Technical Discussion by Sandy King
    By Michael Kadillak in forum Darkroom: Film, Processing & Printing
    Replies: 38
    Last Post: 7-Feb-2006, 06:08
  5. Discussion: Pyro stain, silver rich film & thick emulsion
    By Pete Caluori in forum Darkroom: Film, Processing & Printing
    Replies: 10
    Last Post: 22-Nov-2003, 04:39

Tags for this Thread

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
  •