>First impressions of this lens on the 7D and 5D3 cameras were good. Surprisingly, neither back nor front focus was observed. However, in the future, with painstaking work, it was noticed that adjustment is required. On the first of these cameras, an input of minus 2 divisions was required, on the second - by plus 2. It is also worth noting that in some cases there is a certain offset - misses, but not more than the depth of field, which is visible only at high magnifications.
> A significant nSee full review