Position of the aperture value marking on the Goerz Process lens 14" F:11

[HerzL]

Hi everyone,

I'm new here, and of course I'm jumping right in with a question. I recently managed to win the following lens at auction for €40:




I've read a lot of good things about it. The image circle is huge, and I'm looking forward to using the lens in the future. The glass is in perfect condition; I've cleaned and serviced the aperture mechanism - it now works perfectly. I’d like to use the lens on a 5x7 camera to expose paper negatives and paper positives (I still need a camera—preferably a Burke & James, which are practically impossible to find here in Europe, but that’s another story).
Back to the lens: can anyone who also owns this lens tell me exactly where the mark for reading the aperture value is located? I don’t know—unfortunately, my aperture ring didn’t have that mark.

Thanks for your help.
HerzL

 

[ic-racer]

You should be able to figure it once you have the lens in your possesion.

Aperture lever wide open is f11. Then when it is closed 2 stops (to f22) it would half the opening, so going from 32mm to 16mm, etc. So f45 would be 8mm and so on.

 

[DREW WILEY]

F/11 would be the nominal max aperture. Usually, process lenses are slightly wider fully open.

 

[MTGseattle]

OP. it's simply missing the line that indicates which aperture the ring is set at? Many folks use a spotting sized brush #000 and model paint color of their choice when marking focus helicoids. I've heard other folks using liquid paper for the mark.
If you can determine that the lens doesn't open or close a lot past its designed points, I think you could pick wide open or full close and make a mark at the f# you have chosen and be ok.