Summary: Love this lens. Compared to others that can zoom out to 400mm this one is compact and lighter. Don't get me wrong. It isn't a light weight. Tokina makes excellent glass. This is my second Tokina lens, the other being a super wide angle 11-16mm lens.
Summary: Auto focus tends to hunt for focus on cloudy days. Its a bit heavier than my Nikon lens, Overall, I am very, very happy. I used this lens in Peru and AK… Most people stated that they look like professional shots.
Summary: No it doesn't have Image Stabilization. Yes it is difficult to shoot @ 400mm for the first time. I have to shoot at least 1/400 and usually try to shoot 1/640. Autofocus is noisy but usable. It's a well thought out lens - with a zoom lock @ 80mm, included hood and bag and a decent tripod mount.
Summary: I am a devoted Tokina customer! I have had negative experiences with Tameron and stay away from them. I am a sports photographer and having a lens that is well built and has quick performance is utmost for my profession. Tokina are excellent lens and most of the lens I own are Tokina.
Summary: I've owned this lens for about 6 months now and continue to be amazed at the image quality from this super compact beauty. In fact I owned the Canon 100-400L at the same time so have a great basis of comparison. AF speed is the same for both.
Summary: I have had this lens for over a year and i shot some really good pictures with it. It is by far the most compact 80-400 in the market and the sharpness and the colors are lot better than what you would expect from a third party manufacturer.
Summary: This is not a technical review. Just my personal observations. I've been taking pictures since I was 21 -- Pentax Spotmatic and then Canon F-1. I'm not a professional but I think I know what a good image looks like. I purchased this lens with some trepidation.