![]() ![]() there a really cool setting on the lens where you can tell it what kind of shooting you're doing, with regards to distance. but my XTI just cant be dialed in to that degree. super fast shutter speeds and high IOS's are required in order to freeze the birds in flight. ![]() unfortunately, my XTI cant keep up with the technological demands of this lens. works very well with my much older 2007 Rebel XTI. #Sigma 150 600mm full**NOTE** - my flimsy tripod literally would not support the weight, especially at full zoom, so I did several more days worth of many hours of research for a SOLID, tripod with a Solid gimbal head to match. came with the hood and the mounting foot. this lens, the "contemporary" model, which functions in the exact same manner as the "sport" model, its only slightly smaller, consistently came up as being the best for my intentions, depending on the reviewer. ![]() I spent several weeks, several hours a day, reading articles, looking at specs, watching videos, and gathering information and what not on long lenses for wildlife/bird photography. im not trying to bash here, because it takes awesome photos if you don't push its limits. it looked like it was taken through a piece of clear plastic wrap. I tried doing the same thing at 1/2500, f-8, 450 mm. I caught an Osprey in flight just yesterday. seems distance of your subject is also a factor along with focal length. but even then its still not as sharp as it could be. if I back off the zoom while photographing the eagle, to say, 400mm, and then crop the image later, then I can get a pretty good image. this lens cant deliver it under extreme use conditions. doesn't matter, I want my images to be sharp. I got it pretty dialed in, but its not SHARP. ive tried different f-stops, different ISO's, different shutter speeds. I can go full 600mmm zoom on a hummingbird that only 20 feet away on my deck, and it will be razor sharp! but if I go full 600mm zoom on an eagle in a tree across a riv er? forget it. any more than about 480mm of zoom while zoomed in on objects at great distances, this lens wont be sharp. there seems to be a sweet spot with this lens so to speak. It will take the picture, but it wont be sharp. ive noticed if you're trying to get a subject in focus that happens to be a great distance away, such as an eagle in a tree on the back side of a river, it WONT do it. its a focusing issue I guess you could say. ***UPDATE*** - After using this lens for the last 30 days, ive decided to amend my review with this more aware update. GET THIS LENS and you will not be disappointed! Read full review I purchased a Marumi Super DHG polarizer and when paired with the lens, the results are incredible. If you already have bases covered to 150 mm, and need something that starts there, this lens is superb. Next on my list of things to photograph with it are some eaglets still in the nest that are close to where I live. That's probably just because this lens is a beast that's meant to last. About the only thing that might even come close to a negative is that the zoom ring is a bit stiff to turn. I'm using it on a cropped sensor camera with a 2X teleconverter for moon shots, and they're stunningly detailed. ![]() Images are tack sharp no matter where I have the zoom set. A 600 mm f/4 prime will cost you in excess of $11,000 new, so this thing gives you one heck of a bang for the buck. In the correct light, at the correct time of the day, this lens has upped my birding game tremendously. Despite the fact that that the f/stop starts at 5, the 92mm wide chunk of glass out front gathers a lot of light. Where to start? This lens blew away every expectation I had before making the purchase. ![]()
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