This shot off the patio was my first HDR exposure with the newly acquired Sigma 50mm f/1.4 DG HSM Art lens. For some time, I was without this focal length, using the Canon 17-40L, Canon 100 Macro L, and the Canon 135L. I sold the 35L to acquire the 17-40L for the ultrawide focal lengths when shooting architecture and some landscapes. The 50mm is considered that standard focal length for 35mm film cameras and digital cameras with full frame sensors, as in the Canon 5D, Mark II. On a cropped sensor, like the Canon Rebel series, the 50mm lens will be like a moderate telephoto (80mm lens on a full frame 35mm sensor). I waited for a number of months after this lens was released, in part, due to the incredible press it was getting, in terms of sharpness (most notably, wide open at f/1.4). Reading many individual user reviews confirmed anecdotally, what Sigma and other pre-release testors were saying-the sharpest 50mm out there, save the $4000 Zeiss Otus, which most felt it stood ground with, but at a retail price of $949. Overall, a finely crafted, slightly heavy (reminds me of my old Hasselblad lenses), and superbly sharp piece of glass. The manual focus is particularly noteworthy-no slop whatsoever. I never use autofocus when doing fine art work, other than to get in the general area of focus. I prefer to use the camera like I would a view camera, using Live View with manual focus, wearing magnifying glasses to get extreme focusing precision (using your camera's zoom feature to enlarge the Live View image to maximum size). Unless you are hand holding for a snap shot or candid street photography, always use a tripod and take images with the self-timer or cable release. If you care about the quality of your work, the extra effort is required. And of course, if you are shooting long exposures on Bulb with a Neutral Density Filter, or HDR exposures, a tripod is necessary anway.