My Nikon Model G has developed a 'sinking stage' - the stage will not stay put but slowly descends.
Apparently a fairly common fault.
I am told there's usually a mechanism by which one can tighten up the focusing mechanism and stop this.
In some instances by releases the centres of the focusing knobs and turning the knobs against each other and then retighten.
I have released the centre of my right hand knob but the left will not release and it is not the same as the others. It has a 1mm dia circle cut out of it near the edge and this makes me suspicious that it may be a pin in there simply to prevent releasing it.
Nikon, amazingly and disappointingly would not help at all.
And nor have I been able to find anything elsewhere. Though there's lots of people know of the old Model G and value them as good instruments knowledge of how to fix this thing is not so widespread.
Simple information as to how the Model G was 'retensioned' would be good.
If anyone can help at all?