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  1. #1

    Join Date
    Feb 2007
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    Converting a 4x5 view camera to a......

    hi Guys,

    Is it possible to convert a 4x5 view camera into a 4x5 handheld camera with a helciol mount.

    Seems rather simple, wouldn't you just attach both the rear and front plates of a view camera together, seal for light leaks, then attach a helcoil mount to whatever lens board you have and attach lens? offcourse you would have to atleast work out distances for lens to film plane etc.

    And are there any shiftable lens boards that you can attach to most view cameras.

    Want to find a inexpensive way to make a camera that has ability to shift, a variety of backs, and is portable enough to handhold. Any ideas.

    For something that was similair to what l was thinking have a look here
    http://cgi.ebay.com/Handy-TOYO-WIDE-...QQcmdZViewItem

    Thanks in advance.

    Oman

  2. #2

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    Re: Converting a 4x5 view camera to a......

    You slide off the front or the rear standard from a Linhof Kardan, B, 45S, JBL, GT, E, M, RE.

    You put the ground glass back on one side of the standard and the lensboard on the other side.

    Rodenstock and Schneider both make Helicoids with distance and DOF scales for each of their lenses in 0 shutter. They mount to Linhof Kardan boards with a 3 hole.

    If you need added extension you would have to either have cones made - expensive, or use Wista Extension Sets. To use the Wista Extension Sets you would also need a Linhof Kardan to Technika adapter board.

    Now. How do you plan tio view the scene? Ground glass or with a view finder? If with a view finder then you would have to use the front standard of the Kardan as that has an accessory shoe on it.

    Using these standards you would have 3.3" of rise that can be exteded to 6.6" with an accessory. 5.5" of shift, 360° of swing and 75° of center tilt.

    The only thing you would have to "make" is a plate to accept a grip. The Linhof Anatomical Grip comes with a plate with 2 mounting holes in it along with 2 screws. You could just drill and tap 2 holes to mount this plate. The Grip slides onto the plate.

  3. #3

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    Feb 2005
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    Houston, TX
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    Re: Converting a 4x5 view camera to a......

    Quote Originally Posted by Bob Salomon - HP Marketing View Post
    Rodenstock and Schneider both make Helicoids with distance and DOF scales for each of their lenses in 0 shutter. They mount to Linhof Kardan boards with a 3 hole.

    If you need added extension you would have to either have cones made - expensive, or use Wista Extension Sets.

    Now. How do you plan tio view the scene? Ground glass or with a view finder? If with a view finder then you would have to use the front standard of the Kardan as that has an accessory shoe on it.

    The only thing you would have to "make" is a plate to accept a grip. The Linhof Anatomical Grip comes with a plate with 2 mounting holes in it along with 2 screws. You could just drill and tap 2 holes to mount this plate. The Grip slides onto the plate.
    Fotoman makes two (2) different Helical Focus Mounts. One short (HFM-S, same extension as the Rodenstock) and one long (HFM-LT) with an additional 10mm of extension. Both accept #00, #0, or #1 shutters, and have calibrated distance and DOF scales.

    We also have many different Cones available, which could easily be affixed to your lensboard if you require additional extension.

    Grip? We have two, but we would have to see if your standard could accept them.

    We also sell accessory shoes, complete with springs and mounting screws, as well as dual axis bubble levels.

    In the end, you could pretty much do anything you wanted to.

  4. #4

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    Re: Converting a 4x5 view camera to a......

    [QUOTE=Paul Droluk;232450]Fotoman makes two (2) different Helical Focus Mounts. One short (HFM-S, same extension as the Rodenstock) and one long (HFM-LT) with an additional 10mm of extension. Both accept #00, #0, or #1 shutters, and have calibrated distance and DOF scales.

    Paul, Rodestock helicoids, off the shelf, are the correct length for the focal length lens they are designed for and have the proper focusing and DOF scales for the lens that they are made for. These are not universal helicoids. They are specific to the focal length. Therefore they always focus accurately.

    The focus mount and scales on the one for the 28mm Apo Sironar Digital HR is quite a different length then the ones for the 35mm, 45mm, 55mm, 65mm, 75mm, 90mm, 100mm, 120mm, 105mm, 135mm and 150mm lenses.

    Rodenstock also makes a universal helical called the Modular Focus Mount which accepts 25mm long adapter rings to extend its length. They accept enlarging lenses, C mount lenses and mount to T2 mounts, C mounts or Leica thread mounts. Since they are universal they do not have scales. But they do have a focus lock.

    Schneider also has helicoids similar to Rodenstock's.

  5. #5

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    Re: Converting a 4x5 view camera to a......

    [QUOTE=Bob Salomon - HP Marketing;232466...
    Paul, Rodestock helicoids, off the shelf, are the correct length for the focal length lens they are designed for and have the proper focusing and DOF scales for the lens that they are made for. These are not universal helicoids. They are specific to the focal length. Therefore they always focus accurately.
    ...
    .[/QUOTE]
    They are the "correct length" in connection to which standard holding a film back?

  6. #6

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    Re: Converting a 4x5 view camera to a......

    Quote Originally Posted by GPS View Post
    They are the "correct length" in connection to which standard holding a film back?
    They are the proper length to focus to infinity when the helicoid is at the infinity setting.

    With longer lenses you may need a tube to get the correct flange focal length distance at infinity. Those distances are published by Rodenstock and Schneider so they are easy to figure out if you need an extension. You should not need a recessed board but they are also available for the Kardan.

  7. #7

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    Re: Converting a 4x5 view camera to a......

    Quote Originally Posted by Bob Salomon - HP Marketing View Post
    They are the proper length to focus to infinity when the helicoid is at the infinity setting.
    With longer lenses you may need a tube to get the correct flange focal length distance at infinity. Those distances are published by Rodenstock and Schneider so they are easy to figure out if you need an extension. ...
    Wait a moment again. The helicoid mount, set at infinity, must be in the right flange focal distance from the film plane. As you don't put the mount right on the film it must have a board to go on. The board changes the flange focal distance. With all lenses you must know the distance - only together with the board (or a spacer) you can get the proper infinity setting. If Rodenstock publishes the distance, that's good. So can Fotoman helicoid mount be correctly set at infinity with the correct board thickness. In both cases you need to make the board - spacer so that it's thickness is correct. In both cases you have to add the spacer's dimension to the helicoid dimension. In both cases the helicoid will then correctly focus at infinity, etc.

  8. #8

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    Re: Converting a 4x5 view camera to a......

    Of course it needs a board. I mentioned that a long time ago in this thread.

  9. #9

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    Re: Converting a 4x5 view camera to a......

    If it is so simple to do this from (mostly) existing Linhof parts, then why has Linhof not revived the Technar?

    As this thread demonstrates, there is clearly ongoing interest in hand-holdable wide angle 4X5 cameras. Have you ever seen the feeding frenzy that occurs when a used Technar appears on the auction site?

    Perhaps Bob could point this thread out to Linhof, as I am sure that there is some interest in Munich regarding the future of the Technar. Did Linhof not make a prototype of a new Technar prior to the last Photokina?

  10. #10

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    Re: Converting a 4x5 view camera to a......

    Quote Originally Posted by Henry Carter View Post
    If it is so simple to do this from (mostly) existing Linhof parts, then why has Linhof not revived the Technar?

    As this thread demonstrates, there is clearly ongoing interest in hand-holdable wide angle 4X5 cameras. Have you ever seen the feeding frenzy that occurs when a used Technar appears on the auction site?

    Perhaps Bob could point this thread out to Linhof, as I am sure that there is some interest in Munich regarding the future of the Technar. Did Linhof not make a prototype of a new Technar prior to the last Photokina?
    Because no one bought the Technar when it was available. That is why it went out of production.

    But it would be fairly easy to cobble one together from a Kardan. In fact, one Kardan would give you 2 standards so you would be on the way to making 2 Technar type cameras.

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