[0.2 lb] I use this lens on a Canon 70D for bird photography. The lens works very well in auto focus and provides very sharp photos. I also recently bought the 1.4x 1401 extender which gives me additional range. This extender works well in manual focus with the 150-600mm contemporary lens on the 70D. I don't think that the extender will work with this lens in auto focus with any of the Canon DSLR cameras.

[0.2 lb] Until I bought the Sigma 150-600mm Contemporary zoom, the standard lens I carried into the field was Nikon's 80-400 mm. The 10 Sigma 150-600 is nearly as light but oh so very much sharper. I have photographed everything from dragonflies and butterflies to wild turkeys and Rocky Mountain bighorn sheep with it. The lens produced sharp images of each and every subject. I would and have recommended this lens to friends and acquaintances.

[0.2 lb] Researched this purchase for months. I relied on B&H 's reviews as well as reading through any other information about this lens that I could type into a search bar. I had purchased Sigms art lens recently and was very happy with quality of the lens and it's capabilities. The 150-600 contemporary zoom is big and comes in at around 4 and a half pounds and it is well worth carrying to get the shots you can get. My first big day to test the lens was at a spring training Baseball gain and the pictures I collected are amazing. Close ups from the right field bleachers and from behind home plate. Mounted on a Nikon D7200 with a monopod the images were sharp and I was able to stop action beautifully. Since then I have shot wildlife a including birds in flight with brilliant results. Could not be happier with this lens.

[0.2 lb] Quality and Price is good

[0.2 lb] I have just returned from Florida where I used this lens extensively photographing birds and am very pleased with the results. I hand held it throughout my trip. I would recommend it to a friend.

[0.2 lb] This is an amazing lens for its price, it can be hand held but a tri or monopod makes life much easier. Focus is quiet and fast, the lens lock is great to prevent creep and when carrying. The only thing I would like would be a larger foot option

[0.2 lb] Have used this on 4 outings (2 zoos, a horse farm, and a walk in the park) so far. Am very very pleased w/ it. Makes me want to upgrade some of my shorter lenses to better glass. It is heavy, but especially at the zoo's & the horse farm where I could usually find something to lean on, I was able to shoot & get great pics hand held. Not so much at the park. Needed the tripod there.

[0.2 lb] this a great thing to have to protect you lens from getting beat up.

[0.2 lb] A great option for replacing the plastic, pinch 105mm lens caps for this lens. A nice snug fit and doubtful to lose as I have with past pinch lens covers I've used.

[0.2 lb] I've paired this both with my Canon 6D and 50D and works well with either camera. The optimum combination is supposed to be 500mm and f8, but the images are sharp enough for viewing on my iMac retina display at any combination of f stop and focal length. You can take hand help pix (I need to use my wrist brace for arthritis), but I would suggest at least a monopod for any length of time. Tighten the plate with an allen key, as it was too loose with just hand tightening. The hoodie lens hood cover (size XL, not the L as stated in the accessories) fits well and once you try this lens with the lens shade you will see why the hood cover is essential. Other than size and weight, I think you could easily replace the Canon 70-300 lens (not the L) with this lens for that focal distance and have an equivalent picture. Sweet choice for anyone wanting to do wildlife photography.