What is the Canon “L” Lens Series?
Good question – and many answers exist, but it is Canon’s professional line (though used extensively by non-professionals) of EOS EF autofocus 35mm SLR and DSLR still camera lenses. Some say L stands for “Low Dispersion” – achieved by the UD lens elements found in these lenses. But, the true answer is probably the one in Canon’s Lens Work III Book – “L” is for “Luxury”.
Watch the sidelines at the next professional sporting event you attend or watch on TV. Look for the identifying L-lens red stripe around the end of the photographers’ camera lenses. These are the people who make a living with their equipment – and they frequently trust the Canon L Lens Series for their income.
About their L lenses, Canon says “these lenses use special optical technologies [such as] Ultra-low Dispersion UD glass, Super Low Dispersion glass, Fluorite elements, and Aspherical elements to truly push the optical envelope.”
OK so what does that mean – practically speaking?
What you can get when you use Canon L lenses (if you do your part right) are amazing pictures. In fact, this amazement is said to cause a disease know as “L-Disease”. Once caught, it is incurable. You will have to buy Canon L lenses in all of the focal lengths you use. AND you will be happy (and I hope you know that I am not being totally serious).
The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion.
|A high-quality, wide-angle zoom for a variety of subjects.|
|Ultra-wide or standard zoom
The EF 17-40mm f/4L USM acts as an ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors it acts as a standard zoom, giving an angle of view equivalent to a 28-70mm lens on a full-frame camera.
Superior optical performance
Non-rotating front element
Smooth background blur