Using a magnifying glass lens on a Speed Graphic

Discussion in 'Large Format Cameras and Accessories' started by EASmithV, Aug 4, 2009.

  1. EASmithV

    EASmithV Member

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    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.

    [​IMG]

    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.
     
  2. Nikanon

    Nikanon Member

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    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. 2F/2F

    2F/2F Member

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    groovy

    Now throw that puppy on your 8x10!
     
  4. archphoto

    archphoto Member

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    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. Schlapp

    Schlapp Member

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  6. Wade D

    Wade D Member

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    I'll have to try that. Looks cool.
     
  7. Bosaiya

    Bosaiya Member

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    It's been one of the most enjoyable threads in a long time.

    http://www.largeformatphotography.info/forum/showthread.php?t=35097
     
  8. FM2N

    FM2N Member

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    I have also used the front element from my binoculars. Gives me an f/4 and is alot of fun on my speed graphic
     

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  9. jnanian

    jnanian Advertiser Advertiser

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    great stuff!
    i love using found stuff as lenses too
    sometimes all alone and sometimes with a friend )
     
  10. numnutz

    numnutz Member

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    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.
     

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    Last edited by a moderator: Aug 4, 2009
  11. Rolleiflexible

    Rolleiflexible Member

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    These are very cool. It would be easy
    to do this with my Norma, with its shutter
    behind the lensboard. Another project.

    I get much the same result in medium
    format by inverting the lens of a Kodak
    Brownie Hawkeye (example).
     
  12. EASmithV

    EASmithV Member

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    I'm really fired up about this!

    [​IMG]

    [​IMG]
     
  13. 2F/2F

    2F/2F Member

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    They are cool. I will have to do it myself. FWIW, they seem underexposed. I'd try adding a stop or two more exposure next time. It may make it easier to get the prints you want.
     
  14. Whiteymorange

    Whiteymorange Member

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    Got excited by this stuff and took apart an old pair of not-so-spectacular 7x50 binoculars. Here's the first try with one of the objective lenses. It's clearer than I thought it would be... probably going to try this one for a few portraits this weekend.

    The gnome is my "darkroom god" in the tradition of the "kiln god" much loved by potters.
     

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