Canon produces the L series line for both zoom and fixed focal length lenses. The L lenses will also work on all film and digital Canon EOS cameras. The red ring around the end of the lens barrel identifies all Canon L series lenses. Some of the lenses have a black finish, but the majority of the telephoto and super telephoto L lenses come in Canon's famous white finish (take a look at the gear of the professional photographers the next time you watch a major sporting event and you will be sure to see many white Canon L lenses).
|Canon 300mm L Lens w/ Signature Red Ring & White Finish|
Having a low index of refraction is desirable because the less the light refracts (or bends), the sharper the focus. The sharpness of an image is also affected by the convergence of light through glass because it breaks the light into colors with different focus points. This is known as chromatic aberration, and using a fluorite lens element helps to reduce this effect by allowing for a lower rate of light dispersion.
|Chromatic Aberration in a Normal Lens vs. a Fluorite Lens|
Canon's Super UD glass is optically superior to standard UD glass, and creates results similar to fluorite. Super UD glass is used in many Canon L series lenses and in some instances, a combination of Super UD and fluorite is used to create several high performance lenses. This optical technology is important because with the perpetual development of higher resolution digital cameras, the greater the demand for an optically superior lens.
|Canon 24-70mm L Lens w/ Signature Red Ring & Black Finish|
|Spherical Aberration in a Normal Lens vs. an Aspherical Lens|
Robust construction is yet another important factor in the quality of the Canon L series lenses. It is extremely critical for photographers to have a lens that can withstand adverse shooting conditions such as rain, wind, dust, dirt, and other environmental challenges. Canon utilizes rubber sealing at interface areas and on moving parts to protect against dust and moisture. Canon's L series telephoto and super telephoto lenses also feature a white finish, which aids in the prevention of heat inside the lens. The white lens surface reflects the sun, thus helping to keep the lens cool in warmer temperatures.
|Canon L Lens w/ Rubber Sealing|
- L.M.To shop KEH's selection of Canon L lenses, click HERE.
For more information on Canon L lenses, check out the following websites:
* Canon Camera Museum
* Canon Professional Network Infobank