exm3racer: MTF posted on Sigma website under tech specs. Direct comparison to 35mm A lens shows very similar center performance, and perhaps better corner sharpness.
Want to see price... I was really close to buying the current Sigma 50mm just for the rendering (new for $400). If this one is better and not crazy price I will have to get it. If not, I suppose I can get a used older version for pretty cheap soon!
where? cannt see them.Can you post the link, please?
I had no filters, just my hand instead a graduated filter
SushiEater: This review to say the least is inadequate. There are no pictures inside the chamber. Why is it so important? Good third party grips have a metal plate running all the way to support tripod socket so camera can be hanged with a strap like BR. Bad grips have small plastic strip for socket support.
As far as "Weatherization" none of them are, even OEM regardless how much they advertize it. Regardless how sealed all of the compartments are the biggest opening is the wheel. If water gets though it the whole grip will flood. And those who carry cameras upside down should be aware of it because that is the worst entry point there is.
Pixel made the very first third part battery grip for the mkIII and I find it pretty good and at a fair pricehttp://www.ebay.com/itm/Pixel-Vertical-Vertax-E6-Battery-Grip-Holder-Pack-Fr-Canon-EOS-5D-Mark-II-BG-E11-/251272395302?pt=US_Camera_Battery_Grips&hash=item3a81007a26