Dollonds-s 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.Read full review

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.

Sharpest lens I’ve ever used Just keep the shutter speed up and use long lens technique and this is a fabulous lens. Can a lens even be sharper? I don’t think so. It’s also light and very easy to handle. I love the built in hood. When I need a similar length zoom I use my 100-400 , which is also very good but I prefer the prime for handling and because it’s s super sharp even wide open.