Bryan, pretty good review, but I was disappointed... you didn't include MTF charts nor measurements for steam falloff. And if I load a mocha in there, does the lens mug suffer from sugar diffraction at f14 and smaller? And you didn't even mention flare... although that probably won't be an issue for me, I always use a Reddi-whip diffusion foam on the filter. However you did a great job covering the lens mug's mounting options. Anybody know if the Manfrotto 322 Grip Head can handle the weight on the lens mug when it's fully loaded?