10-20mm F4-5.6 EX DC HSM lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography
Wide angle of view (102.4° at 10mm and 63.8° at 20mm) offers the photographer greater freedom of expression.
Fully compatible with all Nikon Digital SLR cameras including the D40 and D40X, these are special DC Series Lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus!
Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece of glass mold and two hybrid aspherical lenses, offer excellent correction for distortion, as well as all types of aberration.
This lens is equipped with an inner focusing system, and the models which are equipped with HSM system provide quiet, high speed autofocus shooting and also offer full time manual focusing. It has a minimum focusing distance of 24cm (9.4") at all focal lengths. The non-rotating lens barrel perfectly suits the petal shaped lens hood. A circular polarizing filter can also be used conveniently.
Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.
The Sigma 10-20mm is commonly used for Close up filming, General purpose, Landscape/scenery, Landscape photography, Panoramic filming, Shooting indoors, Shooting outdoors, Special effects, Travel and more.The Sigma 10-20mm is most used by customers who consider themselves to be a Enthusiast, Tech savvy among others.The Sigma 10-20mm is popular because customers like the following qualities of the Sigma 10-20mm: Clear glass, Compact, Consistent output, Durable, Easily interchangeable, Easily mounted, Easy to use, Fast / accurate auto-focus, Improves picture quality, Lightweight, Rugged, Simple controls and Strong construction.