MT Shooter wrote:
The Sigma 50-150mm f2.8 is a very nice range fast lens for the crop sensor bodies. It gives you a similar range to the 70-200mm f2.8 on the full frames but at a considerably lower price. I like the lens and its fast, but might be just a little short on focal range. The up side is that its fully compatible with Sigmas 1.4X and 2X telecoverters, even on your D5100.
Same goes for me. Fantastic DX lens, great build quality, sharp even wide open. I even use it with the 1.4x teleconvertor with confidence it will give me great image quality.