STM lenses, on the other hand, are somewhat slower. And I recommend STM lenses for any videographers searching for the smoothest, quietest focusing experience. Both USM and STM lenses are excellent focusing mechanisms, and both can work well for still photography and videography. Save my name, email, and website in this browser for the next time I comment.
Best Macro Lens for Canon. How to Choose a Camera Lens. So, the best of both worlds. Smoothness and speed ensure that this bold lens is the whole package. Canon STM lenses have very quiet autofocusing making them great for video but are slower at getting focus compared to USM lenses. STM has to do with Stepper Motor technology, and the power comes from the camera body, not from the lens itself.
The Canon STM system was developed specifically for filming video. Canon designed a system with a smoother and quieter focus that is a better fit for this. Even though the focus is smooth, it is relatively slow compared to its USM counterpart. While it is not well-known the precise way in which this lens works, Canon designed a focus motor that removes any noise while filming.
The focusing system is as silent as a stone, and as every professional will tell you, minimal noise while recording is not something to take for granted. Stepper motors are electric motors that rotate in steps. When autofocus is engaged, you lose the option to adjust the focus ring manually. The ring or gear system is the one that composes the focusing system in Ring USM lenses. The movement of the gear makes this lens noisier than some of its counterparts. The focus system is generally way more smooth and quiet when filming.
STMs provide smooth movement while recording. When using an STM lens, the focus tends to be fast enough, which is always a nice thing to have when taking photographs. The price of these lenses is relatively low. Connect your Canon camera to your Apple or Android device for remote shooting and easy photo sharing. Make the most of your camera and bring your stories to life with quick access to tailored, easy-to-use content. Open up the world of Wi-Fi connectivity and revolutionise the way you print, copy and scan.
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Share your passions with vlogging. Master the light any time, anywhere. Shoot in monochrome for timeless chic. Download drivers for your Canon product. Download software for your Canon product. Download a user manual for your Canon product. This indicates a second-generation version of a particular lens. Sometimes it will only be this suffix that separates two particular lenses. This designation, which is currently only applied to a couple of the company's lenses, is used to describe a lens that makes use of a Diffractive Optical element.
These elements are designed to help control chromatic aberration, which typically appear as coloured fringes around the edges of details. They are also used to help control a further effect known as spherical aberration, which softens images.
It also allows Canon to make these lenses more compact than they would otherwise need to be. You can easily spot these lenses, as they are the only ones to have a green ring towards the front of their barrel. It's also used to describe the lens mount on these bodies, which features a single red dot that's used for mounting the lens. This term indicates that the camera and lens can communicate electronically to drive the focusing system inside the lens — and all EF lenses have their own focusing motors built into them.
Because of how these are designed you should never use them on full-frame bodies as you would risk damaging the mirror. Perhaps the main advantage of these lenses is that they can be designed to be smaller and lighter than equivalent EF lenses, as they are working in conjunction with a smaller sensor.
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