[Lexander]

По поводу отличий 28-105/3.5-4.5USM II от 28-105/3.5-4.5USM, читаем камру-музей:

Сообщение от [b

Цитата[/b] ]" practically identical to the EF28-105mm f/3.5-4.5 USM optically and mechanically, but it has a leather toned exterior finish for a higher quality look. It focuses to 0.5m throughout the zoom range using inner focusing. Inner focusing and the Ring USM focusing motor provide silent, high-speed focusing. It has full time manual focus, which allows manual focusing without leaving the AF mode. The non-rotating front ring, which fascinates use of accessories, and other advanced specifications are carried over from the original EF28-105mm f/3.5-4.5 USM.

В кратком переводе: практически идентичен оптически и конструктивно, отличается только отделкой.

На самом деле, отличие еще в количестве лепестков диафрагмы - 7 против 5.