I'm a novice and can't compare it to anything else but I'm happy with the Samyang. I bought it because the reviews were consistent and the price was the same as a 15-20yr old CY Zeiss 135/2.8. Surprisingly, it works well for me at T-ball where I can predicatively focus. In fact, I think the manual focus is an advantage sometimes because the camera isn't deciding what the subject is. There's a lot of stuff moving out there.. It's obviously a great portrait lens.