Canon EF 70-200mm f/4L IS II USM - The mobile telephoto zoom with professional performance, 5-stop IS, and fast USM focusing. Ideal for those who are always on the go: This telephoto zoom lens is extremely compact while delivering professional image quality that truly impresses. Mobile design. Weighing only about 780 g, this versatile 70-200mm telephoto zoom is perfect for anyone who is frequently in motion, whether traveling, reporting, or doing landscape photography. Consistent exposure. The aperture of f/4 remains constant throughout the entire focal length range, so exposure settings do not need to be adjusted. Crisp shots in low light. Even in low light, you can work reliably—thanks to the 5-stop image stabilizer that minimizes motion blur.