Excerpt: I had been anticipating buying this lens for a while. I finally bought it. It is not too heavy, especially compared to my Sigma 70-200, feels very nice, balanced and olid. Upon my first outing with the lens I took about 50 outdoor shots with good lighting.
Excerpt: I bought this for use with my Pentax K-5. The image quality is superior to telezooms I have owned previously. I have used it for children's football events, portraits and landscape fotography so far, and I am very pleased.
Pros: Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction
Excerpt: I use this lens mostly for wildlife and landscape work. Extremely well built, weather sealed, fast, and sharp at all F-stops. My only gripe with this lens is its weight. It is heavy. But, considering the build quality and superb optics, the extra weight is not a very big issue.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction
Excerpt: I have found this to be a very usable lens and I can get a lot closer to things than I would have thought possible. It's a little bit heavy but take it for a photo walk and it's a lot better than a gym workout.
Summary: La qualité optique est excellente, dès f2,8 le piqué est bien là, seules quelques rares situations à f2,8 peuvent engendrer des franges pourpres dans des zones surexposées. Aussi, comme avec tous les objectifs bien lumineux, les zones de flous sont sujettes aux aberrations longitudinales (violet...