This is a great lens, would love to buy this. concrete grinding

Don't have this yet.

The Sigma 170-500mm f/5-6.3 APO RF offers a compelling range and price point for budget-conscious photographers.

Understand its limitations in terms of aperture, autofocus, and build quality before making a decision. Consider your specific needs and shooting style to determine if the trade-offs are acceptable. power washer cincinnati

The zoom features are incredibly fantastic! Aside from that. www.friscoconcretepros.com said that there's no vibration at all.

None at all.

My experience has been a bit different than most others here, as I find this lens to produce very sharp images. I use it on a Nikon D70, and shoot RAW files. I've shot mostly in the focal length range of 400mm to 500mm, still good and sharp. drywall company near me atlanta ga

None so far.

It's really a great buy! Nice quality. fleck 5600sxt

None yet. Would love to see more posts from here.

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none so far

Great optics - sharp even wide open, great color and contrast. Flair and AC are not bad to be noticed. Good tripod collar. My kids really enjoyed using this. | SF Concrete Pumping

Lens creeks terribly.

I was lucky and purchased a truly mint condition used Sigma 170-500 for use with my Nikon D80 10.2MP DSLR w/grip. It has been an excellent investment. I have not used any other brand of lens in the 300 to 500mm range, where I use this lens the most (primarily for wildlife and nature), so I cannot compare one vs the other. What I can say is that, when using a tripod with a remote shutter release, the results of images throughout the focal range has surpassed my expectations, especially considering what I paid. And, even handheld, the percentage of shots that were perfectly in focus was pretty good, though nowhere near the nearly 100% when using my tripod. As a note, I use a Manfrotto Bogen 3221W with 804RC2 pan/tilt head. And, on that subject, the Sigma tripod collar is excellent and operates smoothly. At times the lens can be a bit slow focusing, when compared to, say, my Nikon 55-300mm Zoom Lens, but the difference has not been that much to make me dislike the lens in the least. I am quite sure that the Nikon 200-400mm f/4G Super Telephoto Zoom would surpass this lens in every way, but for the price I would expect that to be the case. The colors are very nice and there is good contrast in the images I have taken. The depth of field produces a sharp and clear main object and a great Bokeh (blur) in the background. The zoom operates very smooth throughout, no stickiness or hang-ups. It can suffer from chromatic aberration (CA) in very high-contrast situations where the background is quite bright and foreground objects are dark. There is definitely lens creep, no way around that unless you decide to use a band. For me, I simply have the strap around my neck and hold the camera in my palm, with the lens pointed up, when walking. Keep in mind that this is not a light weight lens. I cannot give it 5 stars for honest all-out performance only 4. For the money, however, I am very pleased with my Sigma 170-500 and would recommend it to anyone who needs to have more than 300mm focal range and does not want to (or cannot, like myself) lay out thousands for a solid performing lens with this focal range. Added Nov 19, 2012: This lens will work in both AF and MF mode with camera bodies that have the motor to drive the lens, such as a D80, D100, D3, etc. It will only manual focus on models such as the D40, D60, D3000, D5100, etc.

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you can have photo from this lens on front page CBC ottawa or montreal your photography. or from my page
http://hajiagha.tripod.com

is slow and dust going in I am looking to clean dust from inside of the lens ?
but for price I pay working fine for me

looks to me slow but great and have sharp image , I was pay for canon sigma $1200 paint go off and dust go in ? but this older lens looks to me have all and is working fine on my sony A100

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sigma 150-500mm for canon
Tamron 70-300 mme for Nikon I do not likes

Great optics - sharp even wide open, great color and contrast. Flair and AC are not bad to be noticed. Good tripod collar.

Lens cap is a joke. Lens creeks terribly. AF not good for moving tracking, MF not accurate. Heavy (not the lens fault for sure, but still, it's heavy) To me a 1.5lb lens is not heavy, but 3 pounder is.

A great tele with crystal sharp image and beautiful color, if the subject is not moving. Basically this is a poor man's tele that happens to have great optics, yes, the optics is fantastic, but not much else.

AF is slow, tracking a flying bird is impossible for me. Manual focus ring is added as an afterthought for sure, it's loose with very limited travel, so not very useful at all. The lens creeks a lot if not careful. I bought a custom lens cap so I can actually close and open the cap when the hood is on. It's quite heavy. So tripod is very useful if not a must for this lens. The tripod collar is great though - smooth, secure and solid. Shooting slow moving or stationary animals in the zoo is perhaps the best use of this lens for me. The AF is quite accurate if you allow it to work its way through it.

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None. This lens is perhaps the cheapest 500mm tele out there today. With the Mark II out with HSM, this lens is even cheaper today, which makes this a great buy if you are not shooting flying birds. I tried the birds a couple times and give up - AF is just impossible - with 350D and 40D and 5D. AF Canon 70-200 USM is instant, on the other hand. But at 200mm, it's way too short.