These lenses were originally released with Sony's PMW-F3 but I managed to score these off someone selling their F3 kit- *if you are reading this, thank you, they are well loved*. In all honesty, the outer casing is a bit plasticy in comparison to a Zeiss CP2 but the glass is much, much sharper. And if I was making a lens (in my infinite wisdom) on a budget, I'd much rather put that money in the optics. That being said - the lightweight nature of these lenses makes them ideal for gimbal or handheld configurations. Try them out, you'll be gobsmacked.