[watergunhk2007]

請問咩是L鏡?

[pongyee]

"L" means "Luxury" and defines pro-quality lenses. In contrast to consumer lenses they feature a combination of at least one ground aspherical, UD, SUD and/or CaF2 elements which are an important basis for potentially outstanding optical performance.

source from : http://www.photozone.de/8Reviews/canonFAQ.htm#3Q4

係佳能對佢自家靚鏡o既稱呼，講真，係商業宣傳手法。