"I would strongly recommend the zoom telephoto AF70-300 mm Macro Autofocus Lens. I used it on the deer and wild turkeys in my backyard. It was easy for a person with arthritis to use. Loved the autofocus." bhphotovideo.com
"I mainly use this lens for close-up work like insects and plants. It is ideal for a full frame high resolution sensor and is sharp from edge to edge. I can't find any faults at this stage." bhphotovideo.com
"This is an excellent lens with nice quality finish, quick AF and very nice levels of motor noise - the limit switch it very handy to keep AF at a minimum. Images so far have been extremely sharp and free of Chromatic Aberation. Weighting of the lens on the camera gives a nice solid feel, movements are smooth and precise. Using as a portrait lens the AF is incredibly quick considering the focus is not all internal. Price point is also very nice as images compare (and exceed) those taken with pricier units." bhphotovideo.com