The picture quality of 50-500 super telephoto lens is not too good or too bad. It's ok to take a few shots with hands close to 2kg, at least it's worse than 60-600 with hands close to 3kg. The current price is about 5000, which is really delicious. Moreover, the score on Dxomark is almost the same as the score of tens of thousands of Nikon 80-400 II. The disadvantage is that for me who is used to focusing, the picture is a bit dark under normal exposure; The image quality cannot support the total number of hairs; Sunshine head; Sometimes I feel that the center of gravity is misaligned but aligned; It's still a little heavy, but ten times zoom is good. Overall, the cost performance is very high.