ඊලග එකෙන් හරි මෙව්ව ලියන්න..
EF = Elecronic Focus, this is the name of Canon's autofocus mount. "II" means the second version of the lens.
EF-S = Canon's designation for EF "short back focus" lenses designed to satisfy the APS-C crop factor
EX = Sigma marketing term, denotes a higher build...