Sigma 400mm f/5.6

Darp, lught and precice! Must know: NO image stabilizer (IS). Pro's: 1. Super sharp wide open (f/5.6), both on FF 21 mpix (5D II / III ), and cropformat, 7D II. 2. Fast autofocus. When setting focus limiter to 8.5 meters, super fast! 3. Using a really sturdy tripod, can get super-sharp results even with Extender 1.4x III on the 7D II !! This is actual focal lenght 560 mm, combined with cropfactor 1.6 = gets the same framing as using approx. 900 mm on a Full Frame... (tested with 1/8s shutter time) This setuo needs short shutter times (or ultra-sturdy tripod). And a camera with MFA (micro focus adjust). Depth-of-field is shallow, like when used for birding. Need to hit precise, then. But this lens can really NAIL it, yes! 4. Simply lightweight for its focal lenght. Shooting handheld no problem (fast shutter and/or some support to "calm" the virwfinder comes in handy at these 'magnification' rates, always) 5. Super solid, tested by time. 6. Manual focus super smooth and accurate, no problem focusing 'live view" with 10x magnification (use a tripod, yes!). 7. The integrated, retractable hood is really convenient.

fantastic lens I wanted a high quality telephoto lens. I owned the 70-200 f2.8 and used it with a 2x teleconverter on a 5D but the quality at 400 mm was poor. I mostly use this lens with a 5D + tripod combination for skyline landscapes. This lens has an INCREDIBLE sharpness even at 5.6 which is the widest aperture. The quality compares totally with that of a 70-200 f2.8 L lens. The weight is strikingly low - when I compare with my 70-200, the latter seems like a tank. The 400 5.6 is very light and handhold pictures are possible - but of course only with high shooting speed to avoid camera shake. Compared to the price of all other long wider canon telephoto lenses, the 400 mm f5.6 has a HUGE quality-over price ratio... I am very happy with it and will be for a long time ;) !

Great lens, arrived in very good condition 400mm prime lens is very very sharp. Good for bird photography connected to Canon 7D mk ll. The lens is relatively lightweight compared to big zoom lenses which helps snap quick flying birds. Takes a little time to adjust to the 11.5 ft minimum focus length. Most birds require more space than that anyway. Overall the lens has helped take some of the sharpest shots I've ever taken.