This is the only zoom lens that is recommended in combination with the Olympus 2xA teleconverter, which transforms it into a 200-400mm/F10 super tele zoom lens.

• "最后一句说这是唯一推荐的和O记2倍镜配合使用的变焦镜头"。这里并未对其成像素质和定焦镜头做比较，我的理解是有一定差距。