Quick to install. Works great. Great quality.You should really consider making a telephoto lens.

Great webcam. Excellent looks. The thing that holds ito on the Laptop/Monitor seems to be too large for no reason. I would've made it smaller from a better material, for the price that it is being sold they should've "gone the extra mile".Carl Zeiss optics are supposedly what makes a difference.However the lens is the same size as all the regular webcams.I would've thought that Zeiss optics would use a larger and brighted high index lenses that they are known for, to allow more light to get in and improve image quality as additional benefit.Not so. Well the lens does seem to let more light through then the plastics.but most of the improvements seems to come from post processing of the captured image(this is a speculation at this point, I have not done any professional testing to verify my inference).

Nice telephoto lens for the money I had been looking for a while couldn’t afford the others like 2500.00 and up this on does just as good and a lot cheaper

This is simply the best telephoto lens I have ever used. It arrived about 3 weeks ago and has performed flawlessly on both my 30D and my film camera (the old EOS 630). The blurred backround at wider aperture settings is satisfying and seamless, while the contrast, color and sharpness of the image are remarkable. There is a very slight, but barely perceptible, softening of the image on film when the lens is wide open at f=2.8, but by f=3.5 I can't detect any lack of sharpness even on enlargements.The IS works perfectly. There is a little motor noise (very soft) while the IS is engaged, but nothing that would disturb a nearby subject. As others have stated, IS is no complete panacea for hand-held shooting in near total darkness, but I have been able to get a lot of great exposures that would have been impossible with any other telephoto.Another huge plus is that this lens allows full time manual focus; you don't have to flip a switch to override the auto focus. All you need to do is start turning the focus ring. This saves a lot of time and missed shots when the autofocus is choosing something other than what you want to shoot.On the other hand this is not a "walk-around" lens. It is very serviceable off the tripod for short sessions, or even hanging around for a couple of hours. If you watch Art Wolfe on "Journeys To The Edge" (highly recommended show on PBS)he uses this lens a lot, and often hand carries it around without using the neck strap. But it does get heavy after a while. And it is a long,fixed length lens. But the weight and length are just the price we have to pay for a lens that retains its maximum 2.8 aperture through its entire range.If you are serious about the images you create, and can afford the price, this lens is an investment you cannot afford to pass up.

Definitely a good lens, probably use it more than telephoto lenses.

Great lens, I needed a telephoto and everyone pointed me towards this one. It is probably my largest single investment so far in photo equipment but so far its worth it.

i love this combo. the lens's give me everything I need to shoot. kinda wish i had a telephoto but this works for now! thanks canon

you get what you paid for. It's not a product like B&W.Wonderful for sony zeiss 55 1.8. I touched the glassed in the lens and made some scratch and then decide to get this one. This filter can really protect the lens from unintentional touch.