I have owned a Sony Zeiss 24-70/2.8 SSM lens for about 6 years. Since I bought it (new), I have told myself the sharpness at the corners is normal. Maybe I have been trying to justify the cost of the lens, but I want to know what you think. I also want to hear form other SAL2470Z owners. What do you think of the lens you own? Does it look like this in the corners? (For full resolution version, click here.) This shot was handheld with a Sony a900 at ISO200, 1/500sec, ƒ7.1. I made sure to turn off any distortion correction in Capture One, and turned the sharpening down to zero. Note the smeared details at the corners. For what it's worth, no amount of correction in Capture One fixes this issue. Everywhere else in the image is amazingly sharp and always has been. It's just the corners that annoy me. If this were a $500 lens, I'd maybe get used to it, but it was over $1200 and that stings.
I've also noticed that even a single filter causes terrible vignetting at the corners at 24mm. Again, I've told myself this is normal, but it sucks when I use a polarizing filter for a landscape and I end up with black corners at the widest focal length. You can see it slightly in this shot. Apertures smaller than ƒ8 are much worse.