I have a friend that is a Magnum shooter and he primarily uses two lenses on his M6. During daytime he shoots with a 35f2 Summicron (currently the Asph version, but he is thinking of going back to the version IV) and as the sun sets, he switches to a 35f1.4.
Zeiss seems determined to fill in gaps in their line-up. We have 15/18/21/25/28/35/50 and 85 at the moment and several variations within those focal lenghts, two 21/s, now two 35's, two 50's so either more compact, slower lenses or faster, bigger lenses are logical.
I would suspect that a faster 28 or even a 25f2 would be the next step, possibly an ultrafast 50 ("bragging" rights lens). The 28 most likely depends on what Cosina is going to replace the f3.5 and f1.9 with. If Zeiss puts out a 25f2 and Cosina a 28 f1,4 that would solve the problem on the wide end (well, all right, a 21f2 would be a possibility too).
The 85f2 ZM is too big and too expensive, at least for my needs. A smaller,compact 85f2.8 would be tempting though. The other alternative would be a M mount version of the 85f1.4 that now exists in the ZF mount. It would be big and heavy, but it would fill a void for "wide open" fanatics. The 75f1,4 Summilux is out of production and I shudder to think what a Leica replacement of that lens (probably a 75f1,4 Asph) would cost!
These are speculations, but there seems to be a pattern here, both as to focal lengths and avoiding an overlap between the ZM and CV lenses.
I suspect that a ZM 35f1,4 must have been thought of, but I doubt that it would be noticably better than the 35f1,4 VC and it would be quite a bit more money too.
As for the price of the new Biogon 35f2.8 - have you checked the prices for used Summaron 35f2.8's lately!
