Originally posted by Sandy Hancock Well my 06 is utterly hopeless. I sincerely hope it is a defective copy rather than representative of the expected performance.
At 15mm it is reasonably sharp across the frame wide open, and has produced some nice images, but beyond about 20mm the edge sharpness deteriorates rapidly to the point where at 45mm only about the central 10% is remotely useable.
I will post some flat wall test shots to illustrate once they upload.
Hum, I do not have the 06 (yet) but judging from what I have seen here on PF, its most definitely possible to exhort great shots from that lens.
I think that you have a dud, should send it back?