I believe the 17-40 is superior to the 16-35 version 1. The 17-40 is also supposedly very much in the same ballpark as the 16-35 II, with the exception of the stop and a fraction more wide angle.
If you look at the ISO comparisons on TDP the 6D is about half a stop better. Definitely not one full stop, but a good improvement.
However, I got a used 5D2 for a little over $1K (low actuations, good condition). Considering how good the 5D2 still is, I would look around the secondary market for a while before settling on a 6D, especially if you're just looking to upgrade from crop.
Subjectively, my 24-70 II looks better than what I'm seeing here. I reckon your lens is a bit off.
Thanks for your reply - whats your in-camera sharpening setting (in picture style) ?
They can sell a lot of $6000-$7000 cameras to enthusiasts, $10,000+ is harder to do.
Don't professionals use cameras any more, or are professional photographers now so poorly paid that the really nice gear is for the rich hobbyist?
My 24-70 II.
Am I missing something or the Fuji X100S Image quality is on pair with full frame cameras regarding high ISO performance, despite the fact that is using an APS-C sensor.....
This camera is really that good?.... in real life situations?