The stepping motor (STM) in the Canon EF 50mm f/1.8 STM lens significantly enhances video recording capabilities primarily through its autofocus performance. Here are the key improvements:
Near-Silent Autofocus
The STM technology allows for near-silent operation during autofocus, which is crucial for video recording. This minimizes distracting noises that can be picked up by the camera's microphone, ensuring cleaner audio in video productions[1][2].Continuous Servo AF
The lens features continuous Movie Servo AF, which provides smooth and consistent focusing while recording. This is particularly beneficial for dynamic scenes where subjects may move in and out of focus, allowing for seamless transitions without abrupt changes in focus[1][4].Smooth Focus Transitions
The STM system is designed to deliver smooth focus transitions, which is essential for creating professional-looking videos. This capability allows videographers to achieve cinematic effects, such as pulling focus between subjects without jarring movements[2][5].Improved Manual Focus Control
While the STM system is primarily focused on autofocus, it also allows for full-time manual focus adjustments. This feature enables videographers to make fine-tuned focus changes while recording, enhancing creative control over the shot[3][4].Overall, the STM motor in the Canon EF 50mm f/1.8 STM lens makes it an excellent choice for videographers looking for a budget-friendly lens that delivers high-quality video performance.
Citations:[1] https://www.amazon.com/Canon-50mm-1-8-STM-Lens/dp/B00X8MRBCW
[2] https://wistia.com/learn/production/canon-50mm-lens
[3] https://shanelongphotography.com/2020/04/22/canon-ef-50mm-f-1-8-stm-lens-review/
[4] https://www.pointsinfocus.com/reviews/lenses/normal/canon-ef-50mm-f1-8-stm/
[5] https://www.kenrockwell.com/canon/lenses/50mm-f18-stm.htm