01-25-2012, 05:33 AM
I presume that lens maufacturers have at least the same facilities to test a lens as reviewers have. Then why do they release for sale lenses that they know are not as good as they should be knowing that they will get bad reviews for them? I can understand (almost)when it's a cheap lens to manufacture, but when it's about their top lenses it's a bit of a mistery!