Hello, I'm very curious about the sharpenss, I've seen some screen-size pictures with this combination of body/lens, but nothing in regards to the sharpness in the corners on that 14-16mm usable range. Rick or Jeffery or Michael? any insights into that? The term usable is so subjective, could i use this as a primary wide-angle for all purpose shooting?
Flaviu, the corners at F8 at 12, 14, and 16mm are not very good. I'd call them just 'fair' at 16mm, and the sharpness gets worse as the focal length shortens. Here are cropped images. I shot these so that I'd have something predictable in the corners; hence the weird crops.
16mm:
14mm:
12mm:
If you want 100% crops, e-mail me at jeffreybehr(at)cox(dot)net with something like '10-18 crops re LuLa' in the subject line and I'll send them.
Those with limited amounts of money to spend on this stuff, and of course that's merely 99.9% of us, won't want to read this, but my recommendation is the 'EA4 adapter and the fabulous Zeiss ZA 16-35/2.8. Big and heavy, here in the center, flanked by the 10-18 left and the excellent FE Zony 24-70 on the right...
...its image and build quality is VERY high...what I'd call 5-star quality. And its results are just as good on my current Sony a99.