Linhof missed focusing

[Embdude]

Are you using the rangefinder to focus? as there are 3 ways to focus on the Super Technika IV we need to know which ones you have tried. It has rangefinder focus, focus scale focus and ground glass focusing.

[Bob Salomon]

Are you using the rangefinder to focus? as there are 3 ways to focus on the Super Technika IV we need to know which ones you have tried. It has rangefinder focus, focus scale focus and ground glass focusing.

Only if you have the proper cam by serial number of the lens on top and the body on the bottom and you have the correct distance scale and the infinity stops are correctly positioned. Otherwise you only have gg focusing, provided that the gg is properly installed.

[nobrains]

Focusing only using ground glass, no cams calibration done and no infinity adjusted for lenses.

[Embdude]

Then I would agree with what was said previously about a missing fresnel making up the difference...

[Cor]

I recall that in Ralph Lambrechts excellent book "Way beyond monochrome"a method is discribed which shows how to check the depth of the loaded fim holder and the groundglass. Something with a straigth metal ruler and a tooth pick attached to it..

Best,

Cor

[Embdude]

It is possible it is caused by the lens.. focus shift can occur (moves the focus plane slightly further away) when you focus wide open but shoot stopped down...

[Embdude]

It is possible it is caused by the lens.. focus shift can occur when you focus wide open but shoot stopped down...

https://photographylife.com/what-is-focus-shift

[LabRat]

One of my Tek III lenses had a factory custom washer/spacer between board and shutter (precisely machined)... If missing, no way lens focus distance would line up to the RF and body distance markings...

Factory stuff...

Steve K

[nobrains]

Just to close this, I did order a new ground glass as this was too aged and dull. The newer Linhof ground glass is much clear and brighter than the one I'd (since 1961).
The focusing on this GG is much better and was able to get sharp images now!
The mystry still remains, if it was me or the camera as it was showing sharp images on GG but were not sharp before.

Thanks for all your inputs, the problem is now solved

[Tin Can]

Good to know!