I know this won't get much support, but I recently purchased the Sigma 24-35mm f/2, it was on sale for $899.00 and included the Sigma dock. The size and zoom range get chirped at, I find these to be non-issues. This lens is top notch! It is Zeiss like in image quality, resolution, contrast, color and build quality - withAF! Give it a try - I love the lens and think you will too.