[Space Walker]

If using on Nikon DSLR, which lens below is with:

Highest Edge Sharpness
at Wide Open (17/18mm @ F2.8) ??

Sigma 17-35mm F2.8-4 EX DG HSM
Sigma 17-70mm F2.8-4.5 DC Macro
Sigma 18-50mm F2.8 EX DC Macro (new version)

C Hings have comments about this please help to share. Thanks.

[man1492]

May I ask you why edge sharpness is so important to you at wide open?

[Space Walker]

It is because I like to shoot wide night scene with hand held. So I need a fast wide zoom with good edge sharpness without stepping down.

[Philippe]

手持影夜景edge sharpness幾勁都冇用,你要的是Nikon 18-200 VRII.

[man1492]

If you can stand on shooting night scene at wide open, it as absolutely no reason to count on the edge thing...

[Space Walker]

Thanks your comments on 'WHY' behind of my question. But please stick to my question, I am asking 'WHICH'. Thanks.

[man1492]

http://www.photozone.de/8Reviews/index.html

Could this be sticking to your question?