Rodenstock Rodagon

[Gizzo]

hi,
I just got the f2.8 Rodenstock lens, it's normal that I can't stop down the lens anywhere below f8 (I presume)????
I am a total newbie so maybe this is a silly question.
and hello to everyone on the site

 

[dpurdy]

Definitely not normal. Sounds like something hung up with your fstops.
Dennis

 

[Nick Zentena]

I forget but doesn't that have the choice between click stops and no click? I wonder if it's stuck some how.

 

[Gizzo]

yes it does have the choice between click/no-click. but still it won't go down to f22.
I can check better later this evening but so far I have this feeling..

 

[Ian Grant]

Check there's not a small screw in the side, often lenses used the old print heads in Pro labs were locked or had restricted apertures. I had about 10 Schneider (Durst) lenses like that. This was done to prevent colour shifts due to reciprocity.

Ian

 

[Gizzo]

mmm it's hard to explain without images but the ring that selects the f-stops, can be pulled down and it restricts the smallest aperture.
I guess it's very handy if you don't want to mess with it....but I was already in panic because I thought that I had a broken lens.
happy days anyway!!!
Thanks to everyone!

 

[Dave Swinnard]

mmm it's hard to explain without images but the ring that selects the f-stops, can be pulled down and it restricts the smallest aperture.
I guess it's very handy if you don't want to mess with it....but I was already in panic because I thought that I had a broken lens.
happy days anyway!!!
Thanks to everyone!

We have the same issue with students every term. One of the darkrooms has a similar lens. Click or clickless with the "preset" ring, just like some of the old preset SLR lenses. I understand it was useful to folks using darkroom analyzers to set exposure for colour printing. Change the aperture until the needle says "OK" rather than fussing with the (potential) reciprocity issues caused by changing exposure time.

Or at least that's my take on it...

Dave

 

[jordanstarr]

I have a rodagon that allows you to set the "stopper" on it. you have to pull the ring down that you twist to set the aperture and adjust it accordingly. It makes it so that you don't have to feel for clicks or look at the numbers on the lens -you can simply twist it to the stopper to remember where you wanted to stop down between focusing it and printing.