Sigma's New Autofocus Cine Zooms: A Breakthrough in Filmmaking Optics
Sigma has recently unveiled its latest innovations in cinema optics: the new autofocus-equipped Cine Zoom lens series, featuring the 28-45mm T2 and 28-105mm T3 models. These lenses promise to bridge the gap between convenient autofocus capabilities and the tactile precision of traditional manual focus, a significant advancement for videographers and cinematographers. Designed specifically for mirrorless mounts like E-Mount and L-Mount, they leverage Sigma's acclaimed mirrorless optical formulas, offering robust performance in a cinema-grade build.
The standout feature of these new Sigma Cine AF lenses is their sophisticated focusing mechanism. Unlike many hybrid lenses that compromise manual focus experience for the sake of autofocus, Sigma has managed to integrate fast, silent linear motors for autofocus while ensuring that manual focusing maintains a feel similar to mechanically coupled cinema lenses. This means filmmakers can seamlessly switch between precise manual adjustments and efficient autofocus, gaining the best of both worlds without the typical lag or disconnected feel of focus-by-wire systems. The physical design aligns with professional cinema standards, including geared rings for iris, zoom, and focus, along with a 95mm front diameter for easy matte box integration. An 82mm screw-in filter thread is also provided for added versatility.
Optically, these lenses build upon the strong foundation of Sigma's photographic Art series, delivering exceptional resolution capable of supporting 8K footage and producing pleasing out-of-focus areas. While largely mirroring the optical performance of their photographic counterparts, the Cine AF versions exhibit a slightly more pronounced flare characteristic when shooting into direct light. This might even be a desirable artistic trait for some cinematographers. However, it's important to note that these lenses are not parfocal, meaning focus may shift during zooming, and some focus breathing is still present, particularly in the 28-45mm T2. Despite these minor limitations, the overall performance and innovative focus system make them a compelling choice for video production.
The introduction of the Sigma Cine AF series marks a notable step forward in cinema lens technology, offering a potent combination of advanced autofocus and a highly responsive manual focus experience. While the market sees other manufacturers, like Fujifilm, exploring similar hybrid designs, Sigma's current offerings are positioning themselves as leaders in the E- and L-Mount ecosystems. For professionals engaged in video and cinematic work, these lenses represent an excellent investment, providing superior quality and functionality at a competitive price point within the cinema lens segment. Their robust construction and dual-mode focusing performance make them a highly recommended option for creators seeking versatility and precision.