01-18-2017 04:35 PM
01-18-2017 04:44 PM
A lens that uses a stepper motor to focus the lens. These are well suited to video. Though they are being supplanted by USM nano-crystal technology.
01-18-2017 04:50 PM
Hello StanC! STM lenses use a "Stepper Motor" for the autofocus drive motor. This technology allows a more smooth and silent autofocus, and with compatible bodies, will provide continuous autofocus in live view and video. Unlike USM, STM lenses use focus-by-wire to enable full-time manual mode. We hope this helps!
01-18-2017 05:40 PM
@StanC wrote:A STM Lens kit comes with the EOS Rebel SL1. What is an STM Lens kit?
StanC
While not specifically related to what STM means. Canon improved the image quality of each lens as they converted them to the STM focus motor. So in addition to smooth, quiet, fast and accurate focus, STM also means better image quality.
01-18-2017 04:44 PM
A lens that uses a stepper motor to focus the lens. These are well suited to video. Though they are being supplanted by USM nano-crystal technology.
01-18-2017 04:50 PM
Hello StanC! STM lenses use a "Stepper Motor" for the autofocus drive motor. This technology allows a more smooth and silent autofocus, and with compatible bodies, will provide continuous autofocus in live view and video. Unlike USM, STM lenses use focus-by-wire to enable full-time manual mode. We hope this helps!
01-18-2017 05:52 PM
Thanks to you and the other who explained what STM means.
StaC
01-18-2017 05:40 PM
@StanC wrote:A STM Lens kit comes with the EOS Rebel SL1. What is an STM Lens kit?
StanC
While not specifically related to what STM means. Canon improved the image quality of each lens as they converted them to the STM focus motor. So in addition to smooth, quiet, fast and accurate focus, STM also means better image quality.
04/16/2024: New firmware updates are available.
RF100-300mm F2.8 L IS USM - Version 1.0.6
RF400mm F2.8 L IS USM - Version 1.0.6
RF600mm F4 L IS USM - Version 1.0.6
RF800mm F5.6 L IS USM - Version 1.0.4
RF1200mm F8 L IS USM - Version 1.0.4
03/26/2024: New firmware updates are available.
EOS 1DX Mark III - Version 1.9.0
12/05/2023: New firmware updates are available.
EOS R6 Mark II - Version 1.3.0
07/31/2023: New firmware updates are available.
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