The ef 70 200mm f28l is ii usm is the professional photographers workhorse telephoto zoom lens using fluorite to improve image quality it has a rugged durable design and 4 stop image stabilizer is as the most popular lens of many professional photographers the ef 70 200mm f28l is ii usm matches canons highest standards of l series optics build quality reliability and operability an improved robust construction includes dust and moisture resistant seals to protect against harshest