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Thread: Making a 6x9 frame on 4x5 GG

  1. #1
    Unwitting Thread Killer Ari's Avatar
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    Making a 6x9 frame on 4x5 GG

    Hi,
    Maybe I'm missing something here, but how would I make an accurate 6x9 frame on my 4x5 GG?
    My LFPF & Google searches turned up nothing.
    I have a Graflex 6x9 holder.

    Thanks in advance.

  2. #2
    Drew Wiley
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    Re: Making a 6x9 frame on 4x5 GG

    I just took a bit of leftover Cibachrome paper, which is a tough dimensionally stable opaque polyester and sized it to fit rigth under the gg clips, then used an art knife to make
    the exact 6x9 cutout.

  3. #3
    C. D. Keth's Avatar
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    Re: Making a 6x9 frame on 4x5 GG

    I don't know exactly how your holder and camera back is designed. When I did this, I could remove the groundglass frame and set the rollfilm back in place backwards with the darkslide facing out. Then I just set the groundglass frame back into place the best it would go and just traced the outline of the opening. Once I had that done, I just touched up the lines a bit and that was that.

  4. #4

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    Re: Making a 6x9 frame on 4x5 GG

    1. Take off your GG
    2. Take a piece of aluminum foil and cover up the opening, make it flat, double it up for nice sturdy surface
    3. Attach your roll film back, open the lid, take out the insert and dark slide
    4. Mark the opening with a sharpie on the aluminum foil
    5. Take roll film back off, attach your GG.
    6. Mark GG :-)

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  5. #5
    Unwitting Thread Killer Ari's Avatar
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    Re: Making a 6x9 frame on 4x5 GG

    Thanks, guys.
    Nice method, rawhead; pix and everything!

  6. #6

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    Re: Making a 6x9 frame on 4x5 GG

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  7. #7
    C. D. Keth's Avatar
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    Re: Making a 6x9 frame on 4x5 GG

    Very nice, rawhead. That's a simple and elegant solution.

  8. #8
    Unwitting Thread Killer Ari's Avatar
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    Re: Making a 6x9 frame on 4x5 GG

    Quote Originally Posted by wombat2go View Post
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    Yes, but how did you arrive there?

  9. #9
    Unwitting Thread Killer Ari's Avatar
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    Re: Making a 6x9 frame on 4x5 GG

    Quote Originally Posted by RawheaD View Post
    1. Take off your GG
    2. Take a piece of aluminum foil and cover up the opening, make it flat, double it up for nice sturdy surface
    3. Attach your roll film back, open the lid, take out the insert and dark slide
    4. Mark the opening with a sharpie on the aluminum foil
    5. Take roll film back off, attach your GG.
    6. Mark GG :-)

    Click image for larger version. 

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ID:	84086
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    Did it, works great, easy; thanks again.

  10. #10

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    Re: Making a 6x9 frame on 4x5 GG

    For those who love precision, the actual size of a 6x9 image is about 56 by 82 mm, not 60x90 mm.
    This depends on the rollfilm holder in use, sizes may vary by one or two millimeters around 56x82.

    And for those who love to experiment with optics, a perfect centering of the frame can in principe be obtained by the auto-collimation method. A transparent frame is set on the ground glass, some source of light is used to illuminate the frame backward, and a small plane mirror is placed on the entrance side of the lens, perpendicular to the optical axis (i.e. on the edges of the filter mount).
    A sharp image is reflected backward when the ground glass is exactly located in the focal plane, and any residual shift of the frame (or non-zero tilt setting, this is another story, so set your tilts to zero) results in an offset of the reflected image that can be detected easily.

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