Canon Digital SLR Cameras | Canon Digital SLR Lenses

Your Canon Digital SLR Lens can take many lenses to enhance your photography. Most people are interested in either telephoto lenses or wide angle lenses.

A telephoto lens is similar to the "zoom" function- you can take excellent pictures of far away objects. With your telephoto lens, you need to get one with excellent light-gathering ability and a wide aperture, since your photos depend on the amount of light, which decreases as the square of the distance ( a piece of paper one foot away from a candle has four times the light as a piece of paper two feet away from a candle ). So, the further away from your subject, the brighter it needs to be or the better your lens needs to be.

The 85mm f/1.8 is an exceptionally bright, short telephoto lens which is appropriate for both general photography and portraits. Its exceptionally large f/1.8 maximum aperture makes it an ideal lens for shooting under low, available light conditions or for extending the range of your flash. The f/1.8 setting also allows for a paper thin depth of field, a big plus in portraiture.

To meet user demands for a fast EF-S zoom lens, Canon has specially designed a new lens with a large aperture of f/2.8 for select Canon Digital SLR cameras.(EOS 30D, 20D, 20Da, Digital Rebel XT and Digital Rebel only) The large circular aperture produces a shallow depth-of-field, creating background blur that draws attention to the photographic subject. The lens construction includes UD and aspherical elements, which deliver impressive image quality throughout the entire zoom range. Image Stabilizer lens groups shift to compensate for camera movement so that the image appears steady on the image plane, ensuring clear, crisp images, even in dim light. With a Ring-type USM, inner focusing and new AF algorithms, this lens achieves autofocus quickly and quietly, and with full-time mechanical manual focusing, manually adjusting the focus is possible even in AF mode.Canon strengthens its EF-S lens series with the Image Stabilized wide angle EF-S 17-55mm f/2.8 IS USM. With image quality and construction approaching that of Canon's renowned professional lenses, the EF-S 17-55mm f/2.8 IS USM becomes the fastest standard focal length zoom for EF-S mount cameras such as the new EOS 30D. Combining constant f/2.8 aperture throughout the zoom range with Canon's latest 3-stop Image Stabilizer, it delivers outstanding wide angle performance and framing flexibility in low light conditions. Specialist optics such as UD glass and aspherical elements help deliver exceptional clarity, sharpness, contrast and colour accuracy.EF-S mount - The lens fits exclusively on those EOS cameras with an EF-S lens mount - the new EOS 30D, the EOS 20D and Rebel models. The 1.6x multiplication effect of these cameras' APS-C size sensor gives the lens an effective focal length of approximately 27-88mm.Image quality - To improve image clarity over the total image area, two Ultra-Low Dispersion glass (UD) elements are employed to eliminate secondary chromatic aberrations that otherwise reduce sharpness and introduce colour fringing. To ensure crisp, high contrast from one corner of the frame to the other, two aspherical lens elements have been introduced to avoid spherical aberrations that can soften images, especially at wider apertures.