For The Canon T2i / 550d these are two inexpensive add-ons that any photographer will enjoy. Both are from Neewer the Battery Grip for Canon EOS 550D / Rebel T2i SLR BG-E8 and the Neewer Professional Wide Angle Lens 58MM for Canon Digital Rebel T2i / EOS 550D.
The battery grip is a perfect replacement of Canon BG-E8, it can hold 2 X battery pack LP-E8 or 6 X size-AA batteries. The tripod is a screw mount. The battery comes with a one Pro Battery Grip for Canon EOS 550D 600D / Rebel T2i T3i, one Battery Holder for 6x AA batteries (battery not included), one Battery Holder for 2x LP-E8 batteries (battery not included) and a Manual.
The wide angle lens has awesome features and it conveniently works on all cameras and camcorders with 58mm size lens filter thread. The PHD Lens reduces glass flare & ghosting caused by reflections also the high quality rimmed glass reduces light reflection around lens edge. It is infrared compatible for high resolution day & night recordings. And this excellent lens can be separated in two pieces (unscrewed): macro part and wide angle part this way you can use it both ways: like macro lens (without wide angle part) and like wide angle with macro together! This is a really unique feature of this lens for its price. Also, the lens is multi-coated and has an auto focus.
Obviously superb products for a super price! A must get!