> >"L" glass is another class of pro lenses. Usually, >from what I see of the ads, specialized. Something about the >chemistry of the glass helps the predictability of the >refraction, aids in clarity, and cuts down on chromatic >aberration. Like aviation gasoline doesn't make a motor more >powerful, but it allows engineers to tweak the motor to get a >better power to weight out of it. >
John, The "L" lenses you see are only a designation used by Canon. It is a designation they use as part of the lens description for their best lenses. They are not specialized lenses. It is the same as Nikon using the gold ring for their best lenses. Canon also adds a red ring on their L lenses.