Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- User Rating: 
Summary for Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- Great lens
Notes on Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- I can't hold the darn thing steady under 1/100 sec, so with a tripod, it's awesome, otherwise you'll need a steady hand in lower light.
March update - I've gotten better at hand-holding this lens using shutter-priority on my Canon 40D, especially in strong light, but with a tripod it really does do a fabulous job.
Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- User Rating: Summary for Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- Great for sports
Notes on Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- I bought this lens to shoot pictures of my son's football games. It has been fantastic and very clear. Lens creep is an issue but not one that has really bothered me. The price on Amazon was great as I had priced it in NYC and most retailers wanted twice as much if not more.
Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- User Rating: Summary for Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- A great lens for the price.
Notes on Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- This is an extremely versatile lens capable of handling many different shooting situations. I have been using this lens for a couple years now and my only complaint is that there is no zoom lock so in between shots where the lens is pointed up at a fairly steep angle you will need to make sure that the zoom is still in it's intended position. I'ts not exactly a walk around lens because of it's size and weight. It is a good lens to have for shooting wild life or taking photos of the moon. I compared it to the Tokina 400mm lens. This lens was far superior to the Tokina. and as good as the Canon EF 400mm f/5.6L USM Super Telephoto Lens. The only advantage is that the Canon had zoom lock.
This lens takes amazing photos. I am very happy with the quality of photos that I get, great color, sharpness and contrast. It comes with a tripod coller, a great carrying case and a hood.
I am very happy with this lens.
Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- User Rating: Summary for Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- Great Performer
Notes on Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- I own two lenses from Sigma, and I love them both. This ultra telephoto lens is possibly the best bang for your buck in the focal its focal range. If there is a better one in its class I've yet to see it. Manual Focus ring is well placed, easy access, we all like that, right? Sharpness has not been an issue for me at all; you will need a tripod in most situation, but you should be using one all the time, shame on you if you don't! jk, The only gripe I have with this lens is that it does not feature a "zoom lock" as this is a fairly heavy lens, creep can be an issue if you are carrying it around and not shoot. I highly recommend this lens. 5 stars no questions asked.
Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- User Rating: Summary for Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- Can't afford the Bigma? Buy this!
Notes on Sigma 170-500mm f/5-6.3 DG RF APO Aspherical ...- Much has been written praising the Sigma 50-500mm zoom lens, often called the "Bigma." This lens is clearly its equal in everything but zoom range. I was very surprised when I purchased mine, used, and discovered that its sharpness was much better than I expected, and its autofocus speed every bit fast enough for challenging subjects like sports. The price I paid for this under-rated lens was about a third the price of a new Bigma, so I am extremely pleased with the bargain I got.
My only beef with this lens is the "zoom creep" that results when you tilt the camera/lens downwards. The smooth zooming action apparently results in zooming even when you don't want it to.
If you need a 500mm top end, and can live with a 170mm minimum zoom, this lens may be what you need. In my case, the 50mm short end of the Bigma wasn't wide enough, so I am happier with my 170mm-500mm zoom and a companion 18mm-200mm lens that together cover the full range I need.
This lens is available in a variety of mounts, including the Canon mount listed here, as well as fittings for Minolta and Nikon (my own choice.)
