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Thread: Linhof missed focusing

  1. #1

    Join Date
    Mar 2018
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    Pune, India
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    Exclamation Linhof missed focusing

    Hi,

    I've recently got into shooting large format, bought a Linhof super Technika iv with a Schneider150mm lens.
    I tried searching the web, but couldn't find anything related to it and so do I feel something strange as well, thought will post it here to check if I can find help.

    When I focus, I miss the point of focus on the film and it tends to focus something at the back by a marginal small amount.
    Initially it thought it was me, asked someone else to reconfirm the focus, tried a different lens and back 4x5 and 120 both as well, simillar problem.

    Its a metal body, so can't even say something can be done there, only possiblilty could be ground glass.
    I'm based in India, so can't send it over to the members or Linhof technicians who can service or check it.

    Is there something I can do to cross check before I find someone to repair/service it?

    Thanks,
    Parvez

  2. #2

    Join Date
    May 2009
    Location
    Barcelona/Catalunya
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    112

    Re: Linhof missed focusing

    If it consistently focus at the back of your focus point, probably the ground glass is reversed: the frosted part is probably facing you instead of facing inwards the camera. Try to flip the ground glass, if possible.
    Best,
    Pau

    Some pictures in Flickr.

  3. #3

    Join Date
    Mar 2018
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    Re: Linhof missed focusing

    Thanks Pau for the reply, I did think that but nope it's in correct place and frosted part inside, that is what I'm surprised about, nothing I could find wrong so asked someone else to focus and shoot

  4. #4

    Join Date
    Sep 1998
    Location
    Buford, GA
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    13,611

    Re: Linhof missed focusing

    Your gg spacing is off. There are 4 small set screws that adjust the focus plane position of the gg. They have to be reset.
    It sounds like:
    1 your camera originally had the fresnel under the gg and removed it.
    Or
    2 someone adjusted those screws incorrectly for some reason.
    Or
    3 you are missing the 4 small shims that sit on those screws.

  5. #5
    Tin Can's Avatar
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    Dec 2011
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    15,379

    Re: Linhof missed focusing

    Good to know Bob

    German engineering

    I will keep this in mind
    2022

  6. #6

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    Mar 2018
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    Re: Linhof missed focusing

    Thanks Bob, you always come for a rescue!

    This camera was lying unused for 20+ years and no Fresnel for sure and I was the lucky one to open the fungus filled box!
    I cleaned it but didn't play around with any screws, attached is the image of the ground glass.

    Click image for larger version. 

Name:	16070047614830.jpg 
Views:	37 
Size:	31.8 KB 
ID:	210124

    Is there something I can se using some defined measurements to reset it to normal or will it need someone with experience to set it up for me?
    The problem is finding one locally!

    Thanks,
    Parvez

  7. #7

    Join Date
    Sep 1998
    Location
    Buford, GA
    Posts
    13,611

    Re: Linhof missed focusing

    Quote Originally Posted by nobrains View Post
    Thanks Bob, you always come for a rescue!

    This camera was lying unused for 20+ years and no Fresnel for sure and I was the lucky one to open the fungus filled box!
    I cleaned it but didn't play around with any screws, attached is the image of the ground glass.

    Click image for larger version. 

Name:	16070047614830.jpg 
Views:	37 
Size:	31.8 KB 
ID:	210124

    Is there something I can se using some defined measurements to reset it to normal or will it need someone with experience to set it up for me?
    The problem is finding one locally!

    Thanks,
    Parvez
    You should have an old camera like that get a professional CLA for best results. Any LInhof service center can help you,

  8. #8

    Re: Linhof missed focusing

    If you measure the distance from the gg toward the lens the distance will be somewhere near 13/64 Inches or 5 mm. If not....

  9. #9

    Join Date
    Mar 2018
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    Pune, India
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    Re: Linhof missed focusing

    I so wish there was a Linhof centre in India or a reputed technican or if I was around there Bob!

  10. #10

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    Mar 2018
    Location
    Pune, India
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    Re: Linhof missed focusing

    Quote Originally Posted by Conrad . Marvin View Post
    If you measure the distance from the gg toward the lens the distance will be somewhere near 13/64 Inches or 5 mm. If not....
    Thanks, I'll give it a try and been searching for a technican as well. Wish me luck!

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