Okay, why not join the betting? I would like to mention that Zeiss sometimes uses odd FL (like 25 mm, 100 mm, 180 mm) but rarely - if at all - odd apertures. So my guess is rather f/2.8 or f/2.0, but not f/2.4 or 2.5 ^_^
Quote:Okay, why not join the betting? I would like to mention that Zeiss sometimes uses odd FL (like 25 mm, 100 mm, 180 mm) but rarely - if at all - odd apertures. So my guess is rather f/2.8 or f/2.0, but not f/2.4 or 2.5 ^_^
My Flektogon 35/2.4 would like to have a word
Btw, Zeiss uses odd focal length but the thing is, they pretty much always use those. I don't think they ever made a 24mm or a 20mm lens, except for the Sony/Zeiss 24/2 SSM. All else have been at 21/25/28mm, except a few of their zooms.
Flektogon is Zeiss Jena at GDR era, yes? I'm sorry, this era in this state was a lot of improvisation because there was always missing raw materials.
In Oberkochen, they went this 15 / 18 / 21 / 25 / 28 path (28 is not that exotic, but the others are) with a 16 mm fisheye, if I remember well. Btw. I didn't realize they made a 200/2 Apo Sonnar boah. At the time, my dream was a 180/2.8 Sonnar which would have cost me half a year's income
Let's see who's going to get it right in the end. 
I'm sorry, this era in this state was a lot of improvisation because there was always missing raw materials.
boah. At the time, my dream was a 180/2.8 Sonnar which would have cost me half a year's income 
