Canon stm意思

"STM" in the context of Canon lenses stands for "Stepping Motor." Canon lenses with STM technology are known for their smooth and quiet focusing performance, which is particularly beneficial for video recording. STM lenses are designed to provide fast and precise autofocus while minimizing noise, making them a popular choice for filmmakers and vloggers.

Canon lenses that feature STM technology are well-suited for shooting video because the stepping motor allows for seamless and nearly silent focusing transitions. This is in contrast to some older focusing systems that may produce audible noise during focus adjustments, which can be distracting and ruin audio recordings.

Lenses with STM technology are commonly found in the Canon EF-S and EF-M lens lines, which are designed for APS-C DSLR cameras and mirrorless cameras, respectively. These lenses are often more affordable than their L-series counterparts and offer a good balance of performance and value for both still photography and video work.