If companies like DJI and Bytedance were not enough to convince you that China can now build competitive technology, maybe this one will.The central portion of the frame is delivering peak resolution, rendering every little pixel sharply.There's visible vignetting. CA is surprisingly low, much lower than what I experienced with Sony's non-GM 85mm. Talking about Sony's own, this lens is smaller, lighter, optically better and more functional. The only thing I can think of to Somy's favour is auto-focus performance, Somy being faster, more precise and quieter.The side function button is configurable , I mapped it to engage eye tracking focus, and it's super convenient.Now on the real talk - I have filters that costed more than this. At the price, this lens ... MoreIf companies like DJI and Bytedance were not enough to convince you that China can now build competitive technology, maybe this one will.The central portion of the frame is delivering peak resolution, rendering every little pixel sharply.There's visible vignetting. CA is surprisingly low, much lower than what I experienced with Sony's non-GM 85mm. Talking about Sony's own, this lens is smaller, lighter, optically better and more functional. The only thing I can think of to Somy's favour is auto-focus performance, Somy being faster, more precise and quieter.The side function button is configurable , I mapped it to engage eye tracking focus, and it's super convenient.Now on the real talk - I have filters that costed more than this. At the price, this lens didn't have to be this good, but it is.In a world with excellent phone camera, the industry needs to provide state-of-the-art IQ at affordable prices in order to remain an attractive hobby, otherwise camera will be at risk of becoming limited to professionals. This is the kind of product that enables enthusiasts to produce high quality images without breaking the bank.

Great lens. Pictures are super sharp. Easy to manage.

What a great lens paired with the Sony a7s iii, for video it's an amazing lens, i've only used it a few times for photos and it delivers, not the best lens out there, but for $250 c'mon, it's great!