I've a 250mm Carl Meyer that's cheap and small and pretty. In Alphax 3 which is tiny bit bulkier than a Copal 1
Did kodak make a 300mm f7.7 dialyte lens like their 203mm Ektar?
What shutter does the Commercial Ektar f6.3 300mm use?
The smallest one in my database is the Fujinon C 300/8.5, weighing only 250g.
It has a gigantic 380mm IC, but takes tiny 52mm filters. Overall length is 44.9mm, in a Copal #1 shutter.
Anything that fits in a copal 1 shutter will be perfect.
An Ilex 3 would be fine as well.
So far I have listed:
Nikkor M 300mm f/9
Fujinon C 300mm f/8.5
Schneider G-claron 305mm f/9
Goerz Artar 12" f/9 (?) is sometimes in a Ilex 3.
-OK, I will keep an eye out for these.
300mm Dagor - no
300mm Commercial Ektar - no