This lens is perfect for steadicam and gimbal, but filmmakers will find thousands of uses of this variable prime. And it should be considered a variable prime. It's fast T-stop of 1.8 beats out ARRI Ultra Primes, Cooke S4's, Schneider's, and Zeiss CP.2s. It gives you prime lens performance and saves time on lens swaps. It's neutral nature and clean images allows it to cut well with other modern cinema glass. This is a professionally rehoused super speed wide angle zoom by GL Optics using the highly regarded Sigma 18-55mm T1.8 ART lens. This lens is surprisingly sharp at all focal lengths and apertures, even wide open- very little image distortion. It's image quality is similar to that of Zeiss Superspeed primes. This version is the extended focus throw with nearly 300 degrees of focus rotation with module 0.8 pitch gears and a stainless steel PL mount with 95mm Front (also has 77mm threaded filter ring)