Canon EF 70-200mm f/2.8L IS II USM vs its predecessor :If we compare these 2 generations of L series telephoto lenses on a Canon 5D Mark II, we can see the following:These 2 lenses are very similar in term of transmission, distortion and vignettingThe version II gives slightly less chromatic aberrationThe Canon EF 70-200mm f/2.8L IS II USM offers slightly less resolution with 51 lp/mm compared to the excellent 61 lp/mm of the Canon EF 70-200mm f/2.8L IS USMThe slightly less good resolution result of the Canon EF 70-200mm f/2.8L IS II USM comes from less homogenous