Roger and Tripod,
Thanks for the suggestions. Do you have any idea how these lenses compare with the Voigtlander 28/3.5, with respect to sharpness, color rendition, or "character"?
Jamie
Dear Jamie,
There are ony about four lenses I've not tried in the Voigtländer line-up -- and unfortunately, the 28/3.5 is one of them!
But put it this way: the Kobalux/Pasinon is unreasonably sharp, with surprisingly good illumination, neutral-to-warm in colour (typical 'Japanese' look) and seems to have a high MTF at low frequencies for 'sparkle'.
I remember it as an excellent 'technical' lens, i.e. it doesn't have the personality of (say) a Sonnar-C 1,5/50, but then, I'd not want too much personality in a wide-angle: I'd rather have low distortion, high sharpness, etc.
Best of all, if you can find one, it's likely to be silly-cheap. Quite honestly, I'd be surprised if the 28/3.5 Voigtländer were all that different -- I've heard only good things about it -- but the Kobalux/Pasinon is cheaper.
The quality of wide-angles in general, and 28 and wider in particular, improved dramatically in the 70s, and I'd rather have a modern Voigtländer or Kobalux/Pasinon than a 60s Leica 28; I suspect the same is true of Canon and Nikon too. Of course there are exceptions -- 21 Biogons from the early 50s and later, for example, or 21 Nikkors rom the late 50s and later -- but they do tend to be exceptions.
Cheers,
R.