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Thread: Center/Axis Tilt vs Base Tilt

  1. #1
    Grego
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    Center/Axis Tilt vs Base Tilt

    Is one type of tilt more versatile than the other? Is having both worth the extra cost? Which is the better to have when combined with asymmetrical tilt?

  2. #2

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    Re: Center/Axis Tilt vs Base Tilt

    What kind of camera are you looking for ?
    A field or a mono rail ?

    Both tilt versions have their adapts and once you are used to one type of tilt it does not matter anymore.

    E.i. Sinar has both base tilt and asymmetrical tilt, the base tilt being simple, the asym tilt being geared on my P2. I use the asym tilt only.

    At one point or the other you will have to refocus anyway.

    Peter

  3. #3
    Octogenarian
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    Re: Center/Axis Tilt vs Base Tilt

    The Ebony 45SU has asymmetrical tilt on the rear standard and axis tilt on the front standard.

    This is an ideal combination. That's why Ebony offers those movements on their top of the line cameras.

    Makes for easy tilting adjustments.

  4. #4

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    Re: Center/Axis Tilt vs Base Tilt

    The Linhof Kardan GTL-AMS has all three. Continuous variable assymetric front and rear tilts, front and rear axis tilts and front and year base tilts to make the camera yaw-free. But it weighs almost 20 pounds and you would not want to carry it in the field.

  5. #5
    Grego
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    Re: Center/Axis Tilt vs Base Tilt

    I'm looking for a field camera.

  6. #6
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    Re: Center/Axis Tilt vs Base Tilt

    Greg,

    As far as i know, Ebony is the only manufacturer to offer asymmetrical rear tilt on their wooden flatbed field cameras, both folding and non-folding types.

  7. #7

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    Re: Center/Axis Tilt vs Base Tilt

    If you are a landscape photographer who wants to do the classic "foreground in focus out to the horizon" then focus on the horizon and simply use the BASE tilt of the back to bring the foreground in focus.

    Sufficient for 95% of the shots you see here ;-)

  8. #8
    Still Developing
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    Re: Center/Axis Tilt vs Base Tilt

    Quote Originally Posted by Frank Petronio View Post
    If you are a landscape photographer who wants to do the classic "foreground in focus out to the horizon" then focus on the horizon and simply use the BASE tilt of the back to bring the foreground in focus.

    Sufficient for 95% of the shots you see here ;-)
    Am I right in saying that following this procedure, your horizon will now be out of focus if it appears in your frame somewhere? (i.e. with base tilt, every part of the frame will move focus slightly except the very top edge of the frame). So the real procedure is to focus on infinity, base tilt for the foreground, refocus on infinity, retilt to check foreground, focus on infinity again, retilt to check foreground.

    Tim
    Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com

  9. #9
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    Re: Center/Axis Tilt vs Base Tilt

    Quote Originally Posted by timparkin View Post
    Am I right in saying that following this procedure, your horizon will now be out of focus if it appears in your frame somewhere? (i.e. with base tilt, every part of the frame will move focus slightly except the very top edge of the frame). So the real procedure is to focus on infinity, base tilt for the foreground, refocus on infinity, retilt to check foreground, focus on infinity again, retilt to check foreground.

    Tim
    When you first focus on infinity, the distance the lens's rear nodal point to the film has to be maintained when you tilt to keep those infinitely distant objects in focus. For those sorts of landscapes, the horizon is high in the composition and low on the ground glass. When you use base tilts, the infinity part of the tilted focus plane will be at the bottom edge of the ground glass, and the tilted focus plane will come toward you as you go higher on the ground glass (presumably to keep the foreground in focus). The further the focus plane is from the camera, the greater the depth of field above and below it, and at the horizon focus is maintained.

    If the horizon is low because the main subject is clouds, then everything in the image is at infinity and beyond the hyperfocal distance--no need for tilts there.

    With axis tilts, the bottom of the ground glass will get closer to the subject, which will always be outside the focused domain when you originally focused on infinity.

    For me, axis tilts have some usefulness on the lens standard, but I was constantly refocusing my Cambo when using axis tilts on the rear. Thus, I mostly did things with lens tilts. With the Sinar's base tilts, the above trick is far easier. One key advantage to using rear tilts (assuming the perspective projection of the scene can handle it): the film stays within even limited lens coverage.

    Rick "just getting used to base tilts" Denney

  10. #10
    Still Developing
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    Re: Center/Axis Tilt vs Base Tilt

    Quote Originally Posted by rdenney View Post
    The further the focus plane is from the camera, the greater the depth of field above and below it, and at the horizon focus is maintained.
    Hi,

    Hope you don't mind me quizzing you as my understanding differs a little and I've probably got a lot less experience than you so would like to learn...

    So if your horizon is an inch away from the top of the frame, and you use base tilt to bring something at the bottom of the frame into focus (lets say a nice flower at 2m away) then the focus shift caused on the horizon line by tilting is negligible and encompassed by depth of field?

    Even a 1 or 2 degrees of tilt will move the focus at infinity to a focus at 100m or so - I know this will probably not be noticed much but it must reduce the resolution at infinity significantly for large prints?

    Tim
    Still Developing at http://www.timparkin.co.uk and scanning at http://cheapdrumscanning.com

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