Results 1 to 4 of 4

Thread: Fall off with wide angle lens

  1. #1

    Fall off with wide angle lens

    I have a used Calumet view camera, Series 400, with a bellows draw of 10", (meas ured from film plane to lens. I don't know if this is the correct way of measuri ng.) My only lens is a CaltarII-N 90 mm, f:6.8. My prints are darker toward the middle and lighter around the outsides of the pr int. Is this what is known as falloff? Is there anything that can be done about it? I'll appreciate any help I can get. I'm just getting started in large format & f ind it rather frustrating. Joe Stanek

  2. #2

    Fall off with wide angle lens

    What you have is falloff, but I don't think it is from your camera lens. You say the prints are darker in the center and lighter around the outsides of the prin t. If you have falloff from the camera lens it should be the opposite. The print s should get darker at the outer edges because the negative would be thin at the edges. What does your negative look like? I think your problem is in your dark room. It might be from the enlarger lens you are using. If the focal length of y our enlarger lens is too short you will get the results that you described. Ther e is another possibility is if you are using a condenser enlarger. If the conden sers are adjustable they may not be set properly for the lens you are using. Goo d Luck.

  3. #3

    Fall off with wide angle lens

    I think you should look at your film processing techniques, also. Could be that you are not getting even agitation....more on the edges than in the center of t he film. Frank

  4. #4

    Join Date
    Jan 1998
    Posts
    262

    Fall off with wide angle lens

    I agree with Frank (above). I had the same problem when attempting to use a day light tank with sheet film. What are your processing techniques? I finally mad e myself some developing tubes with pvc and they are working very well. Erik Ryberg

Similar Threads

  1. first wide angle lens
    By Miguel Curbelo in forum Lenses & Lens Accessories
    Replies: 17
    Last Post: 3-Oct-2004, 23:54
  2. wide angle light fall off
    By Mark Windom in forum Lenses & Lens Accessories
    Replies: 1
    Last Post: 25-Mar-2002, 08:42
  3. Wide angle fall off which lens
    By Larry Gaskill in forum Lenses & Lens Accessories
    Replies: 3
    Last Post: 31-Jan-2001, 15:33
  4. Light fall-off with wide angle lenses - attn optics gurus!
    By Glenn Kroeger in forum Lenses & Lens Accessories
    Replies: 2
    Last Post: 16-Oct-2000, 11:32
  5. 4x5 wide angle lens for 6x9
    By Robert Choi in forum Lenses & Lens Accessories
    Replies: 6
    Last Post: 15-Jun-1999, 08:33

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
  •