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This lens is all that is claimed of it. I love it. It was shipped very quickly and the case with which it was shipped is big enough to accomadate my D40 camera my 10-22 wide angle lens and and my 430EXII flash unit. The price was very reasonable indeed!

One of the best lenses I have, sharp to the last mm. I photograph a lot of old (1800') Ambrotypes and Daguerreotypes for research and this lens is just what I needed. Delivery was prompt as promised.Jan

I have owned both this and the original version. The new lens is better in the corners and flares less but the corners are still a little soft at f2.8 and you can get the lens to flare a little if you try. I haven't seen the loss of clarity above 20mm that others reported. Perhaps you would see a slight difference in eyelashes if you did a lot of portraits but this is probably not the best choice for a portrait lens. It is a somewhat better lens for shooting landscapes and other shots where edge to edge clarity is important.But the differences between the two versions are minor and in some instances irrelevant. If you don't shoot a full frame camera the soft edges don't appear in the photo. And flare is a minimal issue at most. It rarely appears and is easy to fix in Photoshop if it does. I would opt for the original if I didn't shoot full frame based on the price difference alone.My only problem with the original was when I had to shoot hand held. Sometimes you can't bring a tripod along which rules out shooting at f16 or 22 so I occasionally ended up with shots that were soft in some of the edges. The new lens will solve that. That is the only reason I decided to upgrade.I haven't used many other lenses in the same range so I can't compare quality with other makers but I'm not aware of anything reputed to be better. I have Canon primes as well as other Canon zooms and in actual use all are generally close in quality. I use the primes if possible when I plan to crop or enlarge…

Purchased this lens after lusting over it for a year and saving my $$$.First, make no mistake, this is a large lens. At slightly over 3.5 pounds, you will know it's around your neck.I purchased this lens for the versatility of 28-300mm, with the understanding that there could be a degradation in quality as compared to something like a 70-200 f2.8 lens.The IS on this lens does an amazing job. I can take shots indoors at 300mm at very slow shutter speeds, with no camera shake. IS is so quiet, I thought it wasn't working, until I turned it off...There seems to be a learning curve with this lens, during which you learn what not to try to do with this glass. IS will make you over-confident and you will use shutter speeds so slow that subject movement will blur the image.Overall I think it's a decent bit of glass, perhaps a little soft, especially in low light and wide open.It's at least as good as my 70-200 L4 non IS lens.The bigger question is: Is this lens worth 2000+ dollars? Depends upon how seriously you take your photography and whether a bit of softness between 28-70mm bothers you. Not having actually tried the 70-200 2.8 lens, I can't fairly compare the two, but I suspect the 70-200 2.8 IS might provide better quality, but less range. Everything is a trade-off.

Outstanding lens.Because of the 4:3 systems 2x multiplier, this lens delivers the same reach as the traditional 300mm 2.8 lens on regular cameras. and it is faster by one stop.This means when a normal camera shoots at 125th sec, this lens give you 1/250th sec.Sharpness and contrast is outstanding. the lens is half the weight of a similar lens for a Nikon.This lens have been with me to and allowed me to photograph in low-light when normal lenses just are not fast enough.HIGHLY recommended for sports, adventure, nature and fashion photography. Its not a small lens, this is for serious users.

I use this lens with my A850 for casual birding and wildlife. (and soon I'm going to try it for sports).Very good construction, hood is a little flimsy but it's probably to keep the weight down. Smooth zoom action for me with no zoom creep.Images look very nice - I haven't had too much time to shoot with it, but so far I really like the lens - I have no problems shooting wide open throughout the zoom range, though if you can stop down to f/8 at 400mm it looks a bit better.AF speed is okay - it's not blazing fast, but it's not too slow. AF limiter (3M - Infinity) helps a lot with speed, though sometimes if you miss focus, it still takes too long to rack back to minimum focus and then out again.The color isn't as bad as I thought it would be - it's not as bling-bling shiny silver as it looks on the web - not a bad lens. Yes, it does extend quite a bit when you zoom out.It also has a respectable 1:4 reproduction size, so you can use it fairly closely with flowers and whatnot to get semi-decent macro shots - very good bokeh on these occasions. Other times, without enough background seperation, some bokeh can look 'busy', but this is a common problem of the 400mm zooms.Overall, a very nice lens and one of the reasons I moved from Nikon, as I didn't like their 80-400 lens offering (also, I needed pure MP to crop heavy for wildlife).I've had a few 100% crops from my A850 and this lens that look awesome, though normally I don't crop that heavy.

I normally buy prime lenses for higher performance compared to zooms, but purchased the 24-70 based on recommendations and hands on checkout in the store. I have to admit it surprised me, after 35 years of shooting with both types of lenses this is the first zoom to come close and in some cases equal my prime lenses. Yes, it is heavy, but so are carrying 4 prime lenses to replace it. Bottomline this is the last lens I will let go of, out of all the Canon and Nikon lenses I own. It is that good. I find it useful for travel, portraits and weddings where I cannot always back away or get closer to compose the frame, this is where the 24-70 shines. The AF is fast and quiet, with on demand manual focus override for those times where AF doesn't select the proper subject. Only the newest lens out from Canon with Image stabilization might better this one.

This product is spectacular and works great with my NEX-5. It's expensive but I would say this lens made that camera my most favorite

This is a tough review. Many of the other reviews have touched on issues that may, or may not apply, and pretty much follow the lead of the internet photo pundits in content. They are legit issues, but not that important from my current perspective.OK, here it is... First, I'll answer the concerns about the halflife of the crop sensor camera in general. It's a non issue, as I see it. Nikon is committed to crop sensor cameras for at least a generation. Canon is in the same boat with their crop sensor cameras. Witness the latest Rebel XTi. It boosts Canon APS sensors to over 10 MP, includes new chip set, and makes the thought of a continued series of APS sensor cameras with new tech features a no brainer. Sure, Canon will be marketing full frame sensor bodies. Sure, I will buy at least one in time. Then again, my APS sized crop sensor cameras will always be the choice for certain jobs, and will keep all of my current and future "S" lenses employed for decades.I own some L lenses, and some full frame non L lenses, but my S lenses are the key to making APS sensor bodies excell. I already own two APS bodies, and if the new Rebel XTi is an indicator, I will own more in the future. Buying S lenses is not a sideshow, nor a dead end. It is just different.If you desire a full frame camera in your future, choose lenses wisely. Buy what you need for the APS sensor bodies, and buy the rest to suit both bodies. If you never buy a full frame sensor body, no big deal, as the APS cameras…

I spend most of my time as a photographer taking macro photographs of flowers and other small things in nature. I chose this lens over Canon's 50mm macro and 100mm macro for two reasons: (1) it is constructed with higher quality UD glass, so it has great color and contrast, and it's incredibly sharp at all f/stops, and (2) at 180mm, it allows you to stay farther away from your subjects and still focus to 1:1. This makes it easier take photographs without disturbing your subjects and it allows you to have a smaller, more blurry area in the background so that the background doesn't compete with the subject for attention. The lens also comes with a tripod color, which allows you conveniently change from vertical to horizontal, and it adds stability with your lens better balanced on your tripod.The lens has an ultrasonic motor, so it's fast and quiet when focusing, though I highly recommend setting the focus limiter 1.5m-infinity when not shooting macro photography. It will speed up the time it takes for the lens to focus. The only drawback I can find with the lens is that it is constructed with only an 8 blade aperture diaphram. Theoretically, with a higher number of blades, it would allow more natural blurs, but I can say I've never noticed a problem in my photographs.

*Update* A reviewer recommended DxO software (dxo.com) for this lens, so I tried out the demo first with these raw files from the zoo. Unreal results. Just amazing. Prints are simply beautiful. You have to try to believe.What a great zoom lens. I prefer primes and really wanted a 100/2.0 to go along with my 50/1.4 for my 5D. However, I got a great deal on the DO zoom so jumped on it because of its versatility.It has to be one of Canon's most controversial/misunderstood zoom lens. The price is one factor and softness the other. The 70-200/2.8 IS takes better pictures (out the box) with less computer work needed later. However, this lens is heavy and white and needs a tripod. But it has terrific quality.It takes time to appreciate this DO lens. I got so many blurry images in the beginning that I almost took it back. But I decided to take pictures all day to figure it out before my daughter's kindergarten class went to the zoo. This is what I discovered:-best sharpness between 70-200 is f/5.6.-between 200-300 is f/11 and f/16-Image Stabilization is amazing-auto focus is lighting quick and accurate-size and weight are amazing for this focal rangeNeedless to say, the pictures I took at the zoo were terrific hand held. Because it was a sunny day, shutter speeds were high and the images were blurry free. Shot in RAW and WOW when I opened them up. This was "L" class all the way. Now, I understood the price/performance advantage of this lens. After five hours at the zoo and…

It is all true, this lens performs with all the characteristics that you have already read about, now you have to see for yourself.

The experience of buying the Canon EOS 60D 22 Piece kit was perfect. - Timing: I got the product within four days. I called the seller as I had no margin for delays. But they react very professionally with clear information on delivery. - Price: They provided the best price I found. - Product: even though the Canon EOS 60D is the same everywhere, they provide a huge value added with the kid.

I believe where this lens meets it's expectations is the ability as a walkaround that can shoot everything with quality.I was looking for a lens that would allow me to have two lenses on a shoot. One being a longer zoom, or one a prime portrait low light, whichever needed, along with my new 24-105Lf4IS... I got tired of lugging alot of lenses around.The Image Stabilization in this lens is superior to the older version, which makes up for low light situations. It would have been nice though if Canon could have managed a f2.8-4 instead, but the lens takes excellent quality L shots, better quality and color than the 17-85IS. Hand held at 1/7s no prob.It has become my "always on" lens, the colors are very pleasant, replacing my 17-85IS. If you are looking for a step into the "L" world, this lens is it. You can add the primes later. Now I'm hooked on my first "L".The 24-105L coupled with the 70-300IS would make a complete package for quality range and pro shots.

I am new to photography, having only taken it up with no prior knowledge, 11 months ago. I have only had a DSLR for the past 7 months.I am also female and not very tall or particularly strong, so size and weight is an issue for me. I am able to carry this lens around with ease all day.I have posted some pictures taken with this lens. It is superb!