This is what he writes about the Optical Quality:
Optically, I really would say this lens is outstanding. There should be nothing to be worried about when production models start shipping. I did not run into any negative issues with the lens alone. With teleconverter attached I noticed that the combination is more sensitive to extremely bright object inside image than with the lens alone at same focal length when shooting wide open.
This is what he writes about the Usability:
For me this lens feels as very nice from every point of view. It is not big nor heavy but has speed and quality. I have used it hand held (no monopod) for two 9 hour days in airshow and carried it around in the wild without feeling any fatique at all. The lens and E-M1 body with hood collapsed fit easily into a compact backpack.
Read the full article at Pekka Potka!
Silver E-M1 body at Amazon, Adorama, Bhphoto, GetOlympus. In Europe at Wex UK.
40-150mm f/2.8 PRO lens at Amazon, Adorama, Bhphoto, GetOlympus. In Europe at Wex UK.
LH-76 lens hood at Adorama, Bhphoto, GetOlympus.
MC-14 1.4x teleconverter at Amazon, Adorama, Bhphoto, GetOlympus.
PRF-ZD62 Z protection filter at Adorama, Bhphoto, GetOlympus.
PRF-ZD72 Z protection filter at Adorama, Bhphoto, GetOlympus.
General links to all new Olympus stuff at Adorama.
ALL new stuff announced at Photokina at Amazon.