Canon EF-S 24mm f/2.8 STM at Amazon for $129.33; Performance. The lens punches above its weight in terms of image quality, with stellar sharpness, negligible colour fringing and little barrel distortion. Overall, it’s an ideal lens for street photography on APS-C DSLRs. Get as near as 0.16 m to subjects for a close-up view of the world as you explore with stepping motor (STM) focusing technology delivering smooth, quiet focusing when capturing movies and live-action stills. The large f/2.8 maximum aperture allows hand-held low-light shooting and control of depth of field letting you isolate your subject As already mentioned, the Canon EF 40mm f/2.8 STM uses a stepping motor for AF. AF operations are fairly fast in phase detection AF mode but, frankly, not quite as speedy as a ring-type USM AF - at least based on the EOS 5D II. In a silent environment there's also a noticeable amount of AF noise although it remains unobtrusive. The only reason you'd use both is to photograph a hazy scene and guard against that unwanted light. Normally, You will need to attach the filter to the front of the lens and the hood to a bayonet mount that would attach over top of the filter to the lens such that the filter is contained in the hood. With the EF-S 24mm Pancake, the hood screws on. The EF 15mm f/2.8 Fisheye, the widest of them all, has a 180∞ angle of view. For more normal-looking wide-angle shots, there are longer wide-angle lenses up to 35mm with the maximum aperture you need. Designed for Canon SLR cameras, the highly portable Canon EF 28mm f/2.8 wide-angle lens offers a terrific price-to-performance ratio. Compare Canon EF-S 24mm f 2.8 STM Lens vs Canon EF-S 10-18mm f 4.5-5.6 IS STM Lens vs Canon EF 40mm f 2.8 STM Lens has a silent focus motor built into the lens. Canon EF 50mm F/1.8 II. Canon EF-S 24mm F/2.8 STM. Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor. minimum focus distance. Compare Canon EF 40mm f 2.8 STM Lens vs Canon EF-S 24mm f 2.8 STM Lens vs Canon EF 50mm f 1.4 USM Lens Press ‎ ↵ Enter ‎ for Accessibility for blind people who use screen readers Press ‎ ↵ Enter ‎ for Keyboard Navigation It is probably because the AF is continually active in AI Servo. In One-Shot Auto Focus, the focus can be fine tuned (Full Time Manual focus) anytime the shutter is half pressed. As soon as you take your finger off the shutter the STM AF goes dead. (really more like part-time manual focus) 😉. EF-S 24mm f/2.8 STM是EF-S鏡頭 *1 系列中最纖薄輕量的成員，鏡身僅長22.8毫米，重量僅約125克，方便放於隨身袋攜帶外出作日常拍攝之用，為用家帶來更佳機動性，其輕巧設計更適合於不同場合低調拍攝。鏡頭提供相等於135格式約38.4mm焦距，帶來接近肉眼的視野，令 e8UyJd.