Sigma 10-20mm EX DC HSM Lens For Nikon
Sigma is an excellent budget alternative manufacturer that still produces a quality product. The zoom on this Sigma brand lens allows you to adjust the cropping of your wide angle shots a bit faster. The 10-20mm range is a super wide angle lens. The f4.5 aperture isn't the best, but its about average for a budget zoom lens. Despite the price, this lens still includes low dispersion elements and aspherical lenses to help minimize the distortion that's common in wide angle lenses.