I shoot with a Canon 20D and before purchasing this lens, used the Canon EF 75-300mm f/4.5-5.6 III USM lens. I've always noticed the limitations of this lens when shooting amateur softball. I reviewed the lens lineup at the Canon website and decided on purchasing the Canon EF 100-400mm f/4.5-5.6L USM Lens. The 100-400mm is a great lens, but it can be a little soft. For that reason I decided to add the Canon EF 70-200mm 2.8/f IS USM telephoto zoom lens to my lens collection.As an L lens, there are numerous features and is manufactured with high quality materials and a higher level of dust and moisture resistance compared to the standard line of lenses. This pro quality lens is meant for serious photographers with high demands of their equipment. The construction is sturdy and consists of 23 elements in 18 groups. The four Super UD-glass elements largely eliminate the secondary spectrum reducing residual chromatic aberration. An improved 8-blade circular aperture offers a more pleasing out-of-focus image. The Canon EF 70-200mm lens weighs in at about 3.24 lbs/1,470 g, and a minimal focusing distance of 4.3 ft/1.3 m. The front thread accepts 77mm filters, be sure to get a 

good quality UV haze filter









to protect the front lens element. This lens is compatible with the 

1.4x II









 and 

2X II









 telephoto extenders.Being white, this lens looks out of place, but helps it stay cool when shooting out in the sun. Some people are concerned that being white, it attracts attention to criminals. From my experience, my 20D attracts attention regardless of what lens I put on it. In addition, I most likely have a camera bag and tripod/monopod with me to further attract attention. I personally doubt a thief looking for something to steal is taking the time to evaluate the cost of the item and are more concerned with the ease of taking something they can unload. I try to make things difficult for would be thieves and have my equipment insured as a back up.The dual IS system has two modes. Mode 1 is for stationary subjects while mode two is for moving subjects. It is recommended that the IS function is not used while using a tripod; however I have successfully used this feature while on my monopod. The IS helps to eliminate camera shake and helps stabilize the lens when shooting from a moving vehicle or in low light situations. While there are limitations to what the IS can do, it can give you a few extra stops. Just keep in mind, the IS attempts to eliminate camera movement, not the movement of the subject being photographed.This lens permits for auto or manual focus depending on how the switch is set. There is also a switch to shift from a 1.4m/4.6ft to infinity or 2.5m/8.2ft to infinity.Included with this lens are the tripod mount, lens hood, and storage case. The tripod mount is the best option to use when mounting to a tripod, helping to maintain balance. Mounting the camera instead creates an unbalanced set up that may topple over. The case is a 

zippered soft case (LZ1324)









 that can also be purchased separately. The 

lens hood (ET-86)









 is used to reduce lens flare and can protect the front element in certain situations. Often times, Amazon recommends purchasing the lens case and hood, however they are normally included with the lens.The Canon EF 70-200mm is such an awesome lens, it almost fails to compare to the 

Canon EF 75-300mm f/4-5.6 III USM telephoto zoom









. The 

EF 100-400mm f4.5-5.6L IS USM telephoto zoom lens









 is a well used option for me, but the clarity and sharpness of the 70-200mm IS lens is more refined. I doubt the 100-400mm lens will be replaced by this lens as a favorite. I find the push/pull focusing of the 100-400mm lens to be a benefit that the 70-200mm cannot replace. This lens can be used for portraits, landscape, sports or as a general walk about lens. The f/2.8L combined with the IS makes this lens a good option for certain low light situations. The features add creative versatility. The Canon EF 70-200mm IS lens comes at a price, but it is worth every bit of it.PROS:Incredible clarity and sharpnessQuiet and quick auto-focusFeatures add creative versatilityDual IS systemCONS:Heavy and bulky (This should be expected with these types of lenses)

After shooting with my older EF 70-200mm 1:2.8 L IS USM for years, I started to notice that my images were softer than those taken with my other (newer) Canon lenses. I had it cleaned and recalibrated and while the results were better, I realized that it was probably time to replace it with the most current version.The new Canon EF 70-200mm f/2.8L IS III USM Lens is somewhat lighter and MUCH sharper. I just returned from an out of state nature shoot where I used this lens extensively hand holding it mostly at 200mm. All the images are tack sharp with excellent colour and detail.The 70-200 has always been my 'go-to' lens for many situations... I love the flexibility to choose either lovely bokeh backgrounds or excellent depth of field depending on the situation and the results I'm trying to achieve. This is a GREAT lens and although it's a bit pricy, it has already proven to be a professional tool that does exactly what it's supposed to.I'm really loving my new Canon EF 70-200mm f/2.8L IS III USM Lens and am glad that I didn't 'cheap out' with a less expensive competitors product.

Bought to fit my Canon zoom lens EF-S 18-55mm 1:3.5-5.6 IS lens that is 58mm total. Make sure to check the size of your lens (the single number with mm attached). Love how it stays securely in place, but easy it is to remove, when I find the perfect shot. Thanks a million!

just got this lens and so far i like it better then the canon 70-200mm lens i just returned . its super fast and quiet . ill be testing it out further in the upcoming weeks.

Prior to my purchase of the Canon EF 70-200mm f/2.8L IS USM, I was torn between this one and another Canon lens, the 70-200mm f/4 IS USM. My research and reviews on the two lenses revealed that the lenses are identical in the same aperture ranges, though I think the larger fixed aperture of the f/2.8 has the bigger advantage when shooting in low light conditions, which I often do. The lens is a bit heavy, but can be handheld. Because of the weight, I opted to get the IS version instead of the non IS one. I have used the lens in live band shows and it reveals excellent images at 70mm up to 135mm, though I agree with most reviewers, that it is a bit soft on the 200mm range. All in all, It has big advantages over this other brothers (Canon f/4, or the non-IS) , though I cannot compare it with other third party lenses (Sigma, Tokina, Tamron). The only drawback would be it's weight.

This polarizer is being used on a Canon EF 70-200mm f/4 L IS USM Lens. It removes glare from water and darkens the sky as it should. I don't see any problem with this polarizer.

The Canon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens is nothing short of incredible. I'm using it on my Canon XTi. With the XTi's multiplication factor of 1.6 the effective focal length of this lens is 112mm to 320mm. The thought of a 112mm to 320mm lens which features a maximum aperture of f2.8 throughout its range and has image stabilization is hard to comprehend at first. After a couple weeks of use, I find this lens is fast, sharp, quiet, and a bit heavy. This lens is fantastic for portraits. It's also great for close-ups taken from about 5-6 feet away. It's far more versatile than I expected.

I purchased a Canon FD to Leica M adapter in order to get some more use out of my 17mm Canon lens. I’m pretty impressed with it so far. It seems considerably better quality than the cheap imported adapters, and not as expensive as a Novoflex. The lens hooks up solid and it feels solid on the camera body. I will most likely try some of their other adapters as necessary.