This 10 20 mm f3 5 ex dc hsm wide angle zoom lens from sigma will bring a 102 4 angle of view to your digital slr this means that although the sensor in your dslr may be smaller than 35mm film youll still be able to achieve sweeping perspectives and capture tight spaces with ease sigmas eld and sld lenses effectively correct chromatic aberration to ensure the 10 20 mm f3 5 ex dc hsm captures high quality shots four aspherical lenses correct distortion while also making for a compact