Linhof missed focusing

[nobrains]

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

[pau3]

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.

[nobrains]

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

[Bob Salomon]

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.

[Tin Can]

Good to know Bob

German engineering

I will keep this in mind

[nobrains]

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.



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

[Bob Salomon]

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.



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,

[Conrad . Marvin]

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....

[nobrains]

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

[nobrains]

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!