Excellent but intensive light

Excellent field goal for the photo, one of the best goals gun on the market (see reviews on amazon.com and comments online) and can be the best on the market for telephoto wildlife photography (inaudible AF, super Fast and accurate, the glasses provide excellent sharpness and color rendering). The stabilizer is also excellent.

Given the aperture of the lens (F / 4.5-5.6), it is very intensive light at 400 mm. It will therefore often used in the forest or a walk in bad weather (mono or tripod) to avoid camera shake (it weighs 1.4 kg, a weight not always easy to handle).

Attention also to the use of filters that can sometimes confuse the autofocus (AF).