鏡頭stm是什麼意思

"STM" in the context of camera lenses typically stands for "Stepping Motor." This term refers to the type of motor used in the lens for autofocusing. Stepping motors are known for their quiet and smooth operation, which is particularly beneficial when shooting video with a DSLR or mirrorless camera. STM lenses are designed to provide fast and accurate autofocus, as well as to minimize noise during focusing, which is important for audio quality when recording video.