[3.9 x 3.4 x 3"] I have limited clicks on the lens up to this point but what I've seen so far is very impressive. Very sharp and the depth of field you can achieve is better than I expected. The one area that I haven't tested is in lower light situations. That was the one things that caused me hesitation in purchasing this rather than the Sony 100-400 which is a bit faster lens. However I expect this lens will hold its own, especially considering it's only about 40% of the cost of the Sony.

[3.9 x 3.4 x 3"] I have limited clicks on the lens up to this point but what I've seen so far is very impressive. Very sharp and the depth of field you can achieve is better than I expected. The one area that I haven't tested is in lower light situations. That was the one things that caused me hesitation in purchasing this rather than the Sony 100-400 which is a bit faster lens. However I expect this lens will hold its own, especially considering it's only about 40% of the cost of the Sony.

[0.165 lb] I needed more range and the Sigma was affordable without compromising image quality. HIGHLY recommend Sigma and specifically the 100-400mm. I take roughly 1k images per week and use this lens frequently.

[3.9 x 3.4 x 3"] A sharp zoom with 400mm reach for under $1000, need I say more? Sigma if you are reading this, PLEASE release teleconverters for this and I will buy every single one of them. As you can see that is my only complaint. Don't spend 2.5X the money just to get 1/3 of a stop more. For me, it was either this or the 200-600 G lens, but when I saw how big that bazooka is, I immediately got this instead and I am super happy with it. I used my trusty old A7iii with this lens. Overall, this lens is amazing, and worth every penny.

[3.9 x 3.4 x 3"] A sharp zoom with 400mm reach for under $1000, need I say more? Sigma if you are reading this, PLEASE release teleconverters for this and I will buy every single one of them. As you can see that is my only complaint. Don't spend 2.5X the money just to get 1/3 of a stop more. For me, it was either this or the 200-600 G lens, but when I saw how big that bazooka is, I immediately got this instead and I am super happy with it. I used my trusty old A7iii with this lens. Overall, this lens is amazing, and worth every penny.

[3.9 x 3.4 x 3"] Excellent image quality. Easy to zoom. Focuses quickly. A very good deal. It is a bit heavy so build up your muscles.

[3.9 x 3.4 x 3"] Excellent image quality. Easy to zoom. Focuses quickly. A very good deal. It is a bit heavy so build up your muscles.

[0.165 lb] I am hobbiest photographer and looking for a zoom pens from last 3-4 years. I was not feeling worth to buy a $2.5k lens just for my hobby . For a long time i stuck with manual mirror lens as those are cheapest option i could get but Finally i got my hands on this Value for money lens which is really great in all the aspects but not tearing apart my pocket. It is not the best lens bit best what you can get within $1k price

[0.165 lb] Tack sharp and decently lightweight considering it’s focal length. A little noisy when focusing (slight high pitched whine), but other than that I have no complaints—a great value.

[3.9 x 3.4 x 3"] I got this lens for my wife's A6600 for wildlife very sharp light enough for her to use no tripod fast focus and the IS is very good I used it over the weekend on my Sony A1 to photo a flag football game and it was fast focus and very sharp on my A1 what a great lens and the price is fabulous ...