The retro lens is the new 12mm f2.
Build is over rate subject in m4/3. I have panny and oly m4/3 lenses and they are the same. Just different finishes to the plastic. The oly 14-150 is a very well made lens and though it is allot of plastic it is a very durable lens. I have been traveling with it and no issue. The whole thing with plastic and m4/3 is to keep the system small and light. A heavier uses of metal will defeat that purpose.
i might be wrong but isnt the 45 f/1.8 that Retro-ish lens they showed off?
http://photorumors.com …f-a-m-zuiko-digital-lens/
Not sure on the $299 price though...
As for build, Gotta say Oly's build isnt -quite- as nice in the m4/3 arena from the lenses I've seen, I think Panasonic has slightly better build..Still very plastic though...

