Rodenstock Grandagon-N 90mm f/6.8 Aperture Dial

[nimo956]

I got this lens a few days ago and have a question about the aperture dial. The dial starts before the 6.8 marking on the shutter and goes a little past the 45 marking as you move it to the end. Is this common/okay? How can I be sure that f/11 is actually f/11 when shooting for example?

[Ari]

It's normal for many lenses to have that; in any case don't worry about it unless your film exposures are way off.
Shoot f11 at f11, etc etc.

[Bob Salomon]

Bear in mind. That very same 0 size shutter is used for many lenses. Some are 4.5 (75mm 4.5 Grandagon or 35, 45 and 55mm Apo Grandagons; some are 5.6 like the 100 to 150mm Apo Sironar-S lenses and some are 6.8 like your lens.
The thing that changes for all of these lenses is the aperture scales, not the aperture lever. That is why the aperture scales are screwed on to the shutter.
What you are seeing is perfectly normal. Checking our stock a brand new, factory fresh, 90mm 6.8 Grandagon-N's aperture pointer (top of shutter) starts about 1/4 inch before 6.8 and goes about 1/4" past 45.
If you set the pointer at anything between 6.8 and 45 that is what you will get.