As canon produces a large series of dslrs and wide range of different lenses , it also produces a l series lenses , which all are the full frame lenses ( ef lenses ) but they can be used on crop sensor cameras of canon . these lenses creates a very sharp image , they are on high rates as compared to other canon simple version lenses . So buying these l lenses improves your image quality to professional . t
These lenses are heavy build and are of very fine quality . one feels happy holding these lenses . so canon 6d is very good option with 24-105mm l lens .