So i've checked all the older threads about focus issues on Bolex and lenses and here's my situation :
I have a Bolex H16 SB, wich I think is regular 16 and have tested the camera with four lenses :
Vario switar compact 17-85 (Bayo Mount) : No problem
Schneider RX 10mm (c mount) : No problem
Canon TV zoom 16-100mm(c-mount): No problem
and the Vario switar 16-100mm (Bayo Mount) :
This one does not focus to infinity when it is set to it's wider end. When it's past the 25mm mark, it starts to get in focus.
When I stop down the lens a bit, it seems that it is a bit more in focus but it could be just an impression.
I've seen on older threads that if the lens what calibrated for s16, it would have a 1 mm focus problem on regular, but I've talked to the seller and he said the lens was used on a regular 16mm.
And the lens looks like new...
Now, the previous owner of the camera made a built light-meter, that I have removed but some elements of his modifications are still visible :
They are screws on the viewfinder to remove the cover.
There is a little thing behind the lens mount, which I think was the measurement cell.
I have checked the viewfinder carefully and Diopter setting is set in a correct position, so I think the camera is OK.
My guess would be that the focus flange of the vario switar needs to be adjusted and I was wondering if it has any settings or screws to calibrate it.