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Thread: What am I doing wrong? Speed Graphic Lens Question

  1. #1

    What am I doing wrong? Speed Graphic Lens Question

    So, I got tired of my 135/f4.7 Optar and went out and got a 135/3.5 Schneider. Put it on the board and now the rangefinder is way off. The shutter is flush against the lensboard (same as the Optar), but the focus is off quite a bit. Ideas?

    W.

  2. #2

    Join Date
    Dec 1999
    Posts
    1,910

    What am I doing wrong? Speed Graphic Lens Question

    The focussing cam was/is speciially calibrated for the original lens, Not all lenses of the same focal length have the same flange focal length - the distance from the mounting flange to the film plane. The cam will only work with the original lens. Why not use the ground glass?

    steve simmons www.viewcamera.com

  3. #3

    What am I doing wrong? Speed Graphic Lens Question

    I like using the SG as my "point and shoot" for 4x5 polaroids. How hard is it to re-cam(????) the rangefinder??

    William

  4. #4

    Join Date
    Dec 2001
    Location
    San Joaquin Valley, California
    Posts
    6,648

    What am I doing wrong? Speed Graphic Lens Question

    William,

    Fred Lustig of Reno is the Graphic Guru who can work all sorts of wonders with Speeders. Unfortunately the last I heard he was ill. You can get his tel# from the www.graflex.org site. I'm sure there must be others who might be able to help. You could give Midwest Photo a call---they've got lots of Graphic expertise. Good Luck!
    I steal time at 1/125th of a second, so I don't consider my photography to be Fine Art as much as it is petty larceny.

  5. #5

    Join Date
    Apr 2000
    Posts
    718

    What am I doing wrong? Speed Graphic Lens Question

    If the rangefinder is a Kalart, instructions for calibrating it are at graflex.org as well.

  6. #6

    Join Date
    Oct 2003
    Location
    St. Simons Island, Georgia
    Posts
    429

    What am I doing wrong? Speed Graphic Lens Question

    You don't say which Speed Graphic you have. The Speeds with top rangefinder have the cam the others have written of. The side rangefinder (Kalart) models are adjustable. A manual for that is online at www.graflex.org.

  7. #7

    Join Date
    Oct 1998
    Posts
    244

    What am I doing wrong? Speed Graphic Lens Question

    Do you have a side-rangefinder, or a top-rangefinder? If the former, then you don't have cams, and can easily adjust your rangefinder yourself. If a top rangefinder, then good luck! There may not have been cams for that lens.

    These subjects are discussed in more detail on Graflex.org
    Alec

  8. #8

    What am I doing wrong? Speed Graphic Lens Question

    It's a top rangefinder, with a cam for a 135mm lens on it. The camera came with a 135mm optar. I switched the lens to a 135mm Schneider and now the rangefinder focus is off.

  9. #9

    Join Date
    Apr 2000
    Posts
    718

    What am I doing wrong? Speed Graphic Lens Question

    Have you set the infinity stops?

  10. #10

    What am I doing wrong? Speed Graphic Lens Question

    Yes try resetting the infinity stops first.

    Put your camera on a tripod and lock it tight. Use the rangefinder to focus on infinity. then lock the rail at that position. Check your focus on the groundglass. If it is out of focus, slide the front standard on the rail (without moving the rail) until you rach sharp focus. Be careful that when you lock the front into position, it doesnt move out of focus. Finally you can move the infinity stops into the new position.

    Then try using the rangefinder on closer objects and check the focus on the ground glass.

    If you are handy, you might be able to make a new rangefinder cam.

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