In article , Me says...
the practical
difficulty on shooting outdoors without the sun in the frame.

What's wrong in having the sun in the frame?

As a Dx and FX user, IMO FX has a massive advantage over DX at these
focal lengths. The Nikkor 18-35 G is less expensive than the Nikkor DX
12-24, it weighs about the same, covers approx the same field of view,
but is much, much sharper. Nothing on DX format comes close,
.....
The Sigma 8-16 DX lens is extreme and unique (as is the Sigma FX 12-
24).

Yes exactly, the Sigma 8-16 beats the Nikkor 18-35.
--
Alfred Molon

Olympus E-series DSLRs and micro 4/3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site