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1. www.kenrockwell.com › canon › eos-rCanon RF 100~400mm IS USM - KenRockwell.com

   www.kenrockwell.com › canon › eos-r

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   Compared to my big, beloved EF 100-400mm f/4.5-5.6L IS II, this RF 100-400 is just as spectacularly sharp and focuses as blindingly fast, and the RF lens is less than half the weight (635g versus 1,550g) and less than one-third the price ($649 versus $2,399)!

   • RF 100-500Mm L Is

     Versus the RF 100-400mm IS USM. Canon RF 100-400mm f/5.6-8...

   • 1.4× Extender

     Like all 1.4× teleconverters, it multiplies the lens' focal...

2. Videos

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     youtube.com

     Canon EF-S 15-85mm f/3.5-5.6 IS USM Lens review (with samples)

     16 Sep 2013

     342.8K views

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     6:30

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     Canon EF 20mm f/2.8 USM lens review with samples (Full-frame and APS-C)

     6 Dec 2017

     131.8K views

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     1:30

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     CCTV Camera Lens Comparison 1.8mm, 2.5mm, 3.6mm, 4mm, 8mm, 12mm, 16mm, 6-60mm, 5-100mm

     14 Jul 2014

     189.2K views

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3. www.dpreview.com › forums › postRe: Ring vs. Micro USM and list of lenses:: Canon SLR Lens ...

   www.dpreview.com › forums › post

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   Sep 19, 2006 · The term "USM" stands for "UltraSonic Motor" - a type of auto-focus drive fitted to many Canon lenses. Although the term USM is quite well known, less well known is the fact that there are actually two completely different types of USM - one good and the other probably not worth worrying about.

4. photo.stackexchange.com › questions › 74876What is Nano USM and how does it compare to an STM or USM lens?

   photo.stackexchange.com › questions › 74876

   Feb 19, 2016 · Canon's Nano USM focusing motors have so far been used in the EF 18-135mm f/3.5-5.6 IS USM and EF 70-300mm f/4-5.6 IS II USM lenses. It is a type of AF motor that, like Ring USM, uses micro-piezo vibrations to move the lens focus elements.

5. www.photoreview.com.au › reviews › mirrorless-lensesCanon RF 100-400mm f/5.6-8 IS USM lens - Photo Review

   www.photoreview.com.au › reviews › mirrorless-lenses

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   The RF 100-400mm f/5.6-8 IS USM is a lens many owners of Canon’s EOS R cameras have been waiting for. Although not particularly fast, it has a winning combination of light weight, easy handling, sharp focusing and a competitive price tag.

   • 4.9/5

6. shotkit.com › canon-usm-lensWhat Is a Canon USM Lens (+ Do You Need One?) - Shotkit

   shotkit.com › canon-usm-lens

   The Canon ultrasonic USM technology is recognized for its quick, precise, and quiet autofocus operation. This makes USM lenses particularly suitable for photography and videography where speed, accuracy, and low noise are essential.

7. www.canonrumors.com › canon-rf-100-400mm-f-5/6/8Canon RF 100-400mm f/5.6-8 IS USM Review - Canon Rumors

   www.canonrumors.com › canon-rf-100-400mm-f-5/6/8

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   Dec 2, 2023 · Key features of the Canon RF 100-400mm F5.6-8 IS USM include; RF-Mount Lens/Full-Frame Format; Aperture Range: f/5.6 to f/45; One UD Element, One Aspherical Element; Super Spectra Coating; Nano USM AF Motor; Maximum Magnification: 0.41x at 400mm; Optical Image Stabilizer; Customizable Control Ring; Rounded 9-Blade Diaphragm

8. People also ask

   What is a USM lens?

   • USM stands for Ultra Sonic Motor. USM refers to a type of autofocus motor used in some lenses produced by Canon. The Canon ultrasonic USM technology is recognized for its quick, precise, and quiet autofocus operation. This makes USM lenses particularly suitable for photography and videography where speed, accuracy, and low noise are essential.

   What Is a Canon USM Lens (+ Do You Need One?) - Shotkit

   shotkit.com/canon-usm-lens/

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   What is RF 100-400mm f5.6-8 IS USM lens?

   • Impressive for a consumer-grade lens is that the RF 100-400mm F5.6-8 IS USM Lens gets Canon's high-performing Nano USM (Ultrasonic Motor) driven AF system now seen in numerous RF lenses. This lens brings a repeat of the consistently excellent performance this system delivers.

   Canon RF 100-400mm F5.6-8 IS USM Lens Review - The-Digital-Picture.…

   www.the-digital-picture.com/Reviews/Canon-RF-100-400mm-F5.6-8-IS-USM-Lens.aspx

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   Which Canon lenses have USM technology?

   • The first lens to feature this technology was the EF 300mm f/2.8L USM, introduced in 1987. Since then, Canon has produced a range of lenses featuring USM technology, including both their premium ‘L’ series lenses and more affordable options.

   What Is a Canon USM Lens (+ Do You Need One?) - Shotkit

   shotkit.com/canon-usm-lens/

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   What is a Nano USM lens?

   • Canon U.S.A.'s Rudy Winston states: "Canon's new Nano USM technology uses a completely different form factor, but achieves focus results within the lens via the same principles of ultrasonic vibration energy, transmitted here into linear (rather than rotational) movement within the lens.

   Canon RF 100-400mm F5.6-8 IS USM Lens Review - The-Digital-Picture.…

   www.the-digital-picture.com/Reviews/Canon-RF-100-400mm-F5.6-8-IS-USM-Lens.aspx

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   Which is better Canon RF 100-400mm f5.6-8 IS USM or sigma?

   • The Canon RF 100-400mm F5.6-8 IS USM Lens vs. Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens comparison shows the Sigma lens having larger dimensions and considerably heavier (approaching 2x heavier) weight. The Sigma lens features a focus distance limit switch. The Canon lens has a higher maximum magnification, 0.41x vs 0.26x.

   Canon RF 100-400mm F5.6-8 IS USM Lens Review - The-Digital-Picture.…

   www.the-digital-picture.com/Reviews/Canon-RF-100-400mm-F5.6-8-IS-USM-Lens.aspx

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   Which lens is better STM or USM?

   • The “better” option depends on your needs. STM lenses are typically better for video due to their silent and smooth focus, while USM lenses are often better for still photography due to their speed and precision. Canon IS vs USM Lens: What’s the Difference?

   What Is a Canon USM Lens (+ Do You Need One?) - Shotkit

   shotkit.com/canon-usm-lens/

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9. www.the-digital-picture.com › Reviews › Canon-RF-100Canon RF 100-400mm F5.6-8 IS USM Lens Review

   www.the-digital-picture.com › Reviews › Canon-RF-100

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   Jan 23, 2024 · The Canon RF 100-400mm F5.6-8 IS USM Lens vs. Canon RF 100-500mm F4.5-7.1 L IS USM Lens comparison shows obvious strong differences. Smaller size and lighter weight are two major advantages the RF 100-400 holds.