I have always preferred simple lens designs. One of the all time classic simple lens designs is the Schneider Angulon, a six element two group design from 1930 which still works well for landscape work and is tiny and light weight. I have three of these, a 165mm with a 10×8″ kit, and 90mm and 12cm ones for 5×4″ landscape work.
The 12cm one was bought specifically for use with my “new” Ikeda Anba wooden camera for Littoral work at Broke Inlet and for karri forest images. (See the blog post about the Ikeda Anba camera for more information).
Early versions of these lenses illuminate a far wider circle than can actually be used, as the corners turn to photographic porridge. See the following scan of the 10×8″ neg with the 12cm Angulon. I use 10×8″ to try lenses for 5×4″ as this usually gives the whole circle of coverage and a very good indication of what a lens will do and what happens with too much rise or fall. However, being a photo-grub at times I like this effect and may make a wide angle 10×8″ camera to use this effect/defect
As the Angulon is a simple design uncoated Angulons are absolutely fine, as this is a flare-free design with only two internal air to glass surfaces. My 12cm Angulon is uncoated and from 1939. The popular belief among young Leica photographers that it is impossible to make pictures with un-mulit-coated non-aspheric lenses is unfounded
I have read a lot of reports that these lenses have bad curvature of field, but at normal landscape apertures this has never been a problem, and in any case the image for a littoral or desert landscape is set up with a bit of rear tilt, so focus is checked on the ground glass screen. Very few field camera and technical camera bodies will allow much rise with wide angle lenses, and I have no intention of carrying a Sinar into the Australian landscape, I will leave that for the mad ones.
Assesment, The Angulon lenses are very light weight and small and should be very affordable. The design gives a very capable lens with more than adequate sharpness in the centre of the field, which broadens when stopped down. There is no flare and it has good contrast.
PS – Parting thought, 35mm is my favoured focal length for 35mm work. A 5.6 Angulon design for 35mm in Leica screw mount would be an utter dream of a light weight lens, and for normal daylight use f5.6 is fine. I have a pair of Voigtlander 35mm lenses, f2.5 and f1.7 for a Leica IIIc and both are far too complex, I like simple lenses
PPS – Half an early version of the Angulon was the logo for Schneider for many years, possibly still is, but the idea of buying a new Schneider lens is not in my mind.