Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,985   Posts: 1,523,965   Online: 829
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    EASmithV's Avatar
    Join Date
    Aug 2008
    Location
    Maryland
    Shooter
    Multi Format
    Posts
    1,873
    Blog Entries
    4
    Images
    121

    Using a magnifying glass lens on a Speed Graphic

    Well, I have been toying with this lens for a while. Everything looked good on the ground glass, and thanks to J. Bruner's video on calculating f stop, I was able to determine everything I needed to make an image.

    It gives me about f3.16, focal length is 143mm

    The result is something quite a bit different from what I usually get. I like it.



    If you have a speed graphic and have not tried this yet, I strongly recommend you do. Any cheap lens will work. You may be surprised with what you get.
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."— Dorothea Lange
    http://www.flickr.com/easmithv/
    RIP Kodachrome

  2. #2
    Nikanon's Avatar
    Join Date
    Jul 2009
    Shooter
    35mm RF
    Posts
    343
    Wouldn't the f-stop of the lens just be focal length divided by diameter of the opening? Ex: 50mm/25mm = f/2 and 50mm/f2= 25mm diameter . So if your lens is 143mm that over f-3.16 = a diameter of 45.25mm for your magnifying glass objective?

  3. #3
    2F/2F's Avatar
    Join Date
    Apr 2008
    Location
    Los Angeles, CA
    Shooter
    Multi Format
    Posts
    8,008
    Images
    4
    groovy

    Now throw that puppy on your 8x10!
    2F/2F

    "Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."

    - Rob Tyner (1944 - 1991)

  4. #4

    Join Date
    Dec 2008
    Location
    Holland and Brazil
    Shooter
    4x5 Format
    Posts
    1,066
    Nice shot !

    They have tried that on the Large Format Photography Forum: they call them Chinese Lenses !
    Some stunning results with $1,- or $2,- lenses.....
    Basicly a single glas Lens Baby does the same, just at a higher price.....

    Peter

  5. #5
    Schlapp's Avatar
    Join Date
    Nov 2004
    Location
    Isle of Lewis, Scotland
    Shooter
    Medium Format
    Posts
    738
    Images
    99
    Great fun.
    Here was my version.

  6. #6
    Wade D's Avatar
    Join Date
    Feb 2006
    Location
    Jamul, CA
    Shooter
    Multi Format
    Posts
    878
    Images
    3
    I'll have to try that. Looks cool.

  7. #7
    Bosaiya's Avatar
    Join Date
    Apr 2005
    Location
    Sumner, Washington
    Shooter
    4x5 Format
    Posts
    400
    Quote Originally Posted by archphoto View Post
    Nice shot !

    They have tried that on the Large Format Photography Forum: they call them Chinese Lenses !
    Some stunning results with $1,- or $2,- lenses.....
    Basicly a single glas Lens Baby does the same, just at a higher price.....
    It's been one of the most enjoyable threads in a long time.

    http://www.largeformatphotography.in...ad.php?t=35097

  8. #8

    Join Date
    Jun 2006
    Shooter
    35mm
    Posts
    795
    Images
    7
    I have also used the front element from my binoculars. Gives me an f/4 and is alot of fun on my speed graphic
    Attached Thumbnails Attached Thumbnails clothespin.tif.jpg  

  9. #9

    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    15,947
    great stuff!
    i love using found stuff as lenses too
    sometimes all alone and sometimes with a friend )
    im empty, good luck

  10. #10

    Join Date
    Sep 2005
    Location
    UK
    Shooter
    Digital Negs
    Posts
    63
    Here Is my effort - Taken through a somewhat grubby window on a rainy day two weeks ago with my Gandolfi 5 x 4.

    First one (The bay-tree in a pot) is from a rectangular hand magnifying glass. Focal length guesstimated as around 250mm aperture about F3. I taped the glass over a lensboard and added a hole in black card approximating an aperture of around f8 over the glass.

    Second is using a magnifying glass from a "Helping Hands" Gizmo. Focal length / aperture was guesstimated at 120mm F2 but I constructed an an aperture of around F5.6 from black card.

    Shutter was an old box capped over the lens, I hoped the shutter speed was around ½ a second.

    Film was Foma 100 developed in Retro Pyro the two images were scanned and reduced in size and Quadtoned with Photoshop.
    Attached Thumbnails Attached Thumbnails LF1.jpg   LF2.jpg  
    Last edited by numnutz; 08-04-2009 at 01:27 PM. Click to view previous post history. Reason: fat fingers

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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