Bower Cine Lenses

Whether you're shooting with a DSLR, Compact System Camera (CSC) or large sensor interchangeable lens video camera, you probably have discovered two things about lenses. Those that are designed for still cameras are far from ideal when used for cine work, and lenses designed for cine work are very expensive.
Why Still Camera Lenses Aren't Ideal for Cine
Optically, as long as a lens will mount, focus to infinity and cover the sensor, you're fine. But it's the mechanical side of things when there are issues. Here are a few...
– Aperture stops. Stills lenses have 1/3rd or 1/2 stop clicks. These create audio noise will filming and also cause visible jumps in brightness level. Cine lenses have no click stops and are continuous.
– Focusing. Autofocus is rarely used when shooting video or cinema. Manual focus is used and a lens with clearly marked distances and a smooth mechanical turn of between 90 and 120 degrees is desirable. Lenses that have "fly-by-wire" focusing are very d...