Sigma 170-500mm f/5-6.3 APO Aspherical

good lens this is a good lens if used with some skill, it is not image stabilized so the best shots are obtained hand held using the camera sports setting for a fast shutter speed. it sometime searches for focus on flying birds so I often choose to focus. I bought the lens used for less than 1/2 the price of a similar new lens, so it was a very good deal, the 500 mm allows me to reach out for bird, still and flying with favorable results, I also used a 2x extender to photograph an eagle quite a distance away. I also photographed a fox in a field after sunset and was surprised the photo was OK. this lens has a big glass at the front and may be a bit heavy for a small person.

I got what I wanted I received my lens pretty fast and it was well wrapped/packaged. I was looking for a 500 mm lens for my canon camera and this lens is in great condition. I am looking forward to taking more photos of bird in my neighborhood now.

A good lens This is a nice lens. The image is sharp and the auto focus is quick and accurate. The only negative is, I wish the zoom had a brake so when the lens is pointed down when carried it would stay put rather than extending out to full length.