If you don't listen to me, you will regret it. It's a waste of money. 7D high-speed camera capture, especially for weddings, has obvious advantages over 5D2, but the lens is very particular, especially Longteng 17-50VC, which can never be used. Although the picture quality is good, the damping is extremely tight, the capture is very time-consuming and the focusing speed is extremely slow. By the time you focus, that moment has long passed, and you can't focus all night. These shortcomings are the achilles' heel of the failure of capture. Canon's 17-40 focal length is too short to blur. Many newcomers especially like the blur feeling. 17-40 has no anti-shake. Don't underestimate anti-shake, this is very important. There is also 24-70, although the picture quality is very good, but it is also not anti-shake. The anti-shake problem can be ignored, but you must hold it firmly, otherwise the shutter will be empty if it is fast enough. The most important thing is that the focal length of 24-70 is not wide enough, which is very important. If you match 24-70, you must add a super wide-angle lens in front, which is the most effective but also the most troublesome. The scheme of a lens is Canon's 17-55, all made of this lens. 15-85 is ok, but blurring is a little more troublesome. These two photos are definitely much better than Longteng.