Which is my favorite announcement in lenses at Photokina 2010?
We have very few good contenders this year, I wish we had more. The pair of 1.4/35mm Distagon T* ZF and Nikkor AF-S 35mm f/1.4G are the most obvious candidates. I think most people will select the Nikkor as the star of the show.
I'm somewhat blasé about these two however, because I have been enjoying a fantastic 35mm lens for many years already. I don't see myself spending on either upgrade. The 2/35mm Distagon remains a very, very good lens.
No, by far my favorite launch announcement is from Sigma. I'm serious!
Here is a relatively compact and versatile telephoto prime lens. Particularly on APS-C I would think, e.g. on a D7000.
I love the new finish too. We saw this finish (inconsistently) appear on production versions of the 70-200 OS, just recently shipping in EOS mount. Unfortunately for that lens, Dpreview tells us that it's really good only for APS-C and away from 200mm.
This will not be the fate of the 150mm prime lens however, which is already known to be a stellar optic. I was able to find the MTF chart of the new version and it is quite fantastic:
Yep, this is my vote for the best lens shown at Photokina 2010.