What do the letters USM on your Canon SLR camera lens mean?
The first application of Canon’s Nano USM technology is in the EF-S 18–mm f/– IS USM lens. This lens will be combined with the new EOS 80D camera if it’s purchased in “kit” form in many markets, as well as being a lens that Canon users can step up to independently if they so desire. 2 rows · First introduced in the 90’s, USM lenses continue to be the fastest Canon glass in the Olympic Estimated Reading Time: 6 mins.
When your download is complete please use the instructions below to begin the installation of your download or locate your downloaded files on your computer. With strong built-in optical image stabilization and Canon's Hybrid IS system, close-up shooting and video are sharp and stable. Using the RFmm F2. The How to reduce your capital-gains-tax-liability F2. At its minimum focusing distance of 0.
Whether capturing details of food, jewelry, or traditional macro shots, the RFmm F2. With 17 elements in 13 groups and a 9-blade aperture system, it can deliver detailed images with gorgeous background blur and versatility in low light. Weighing approx. With its mm fixed focal length, the RFmm F2. Because RF lenses are designed specifically for the RF Mount found on EOS R series cameras, the lens and camera combine to share shooting data, helping to dramatically reduce the effect of camera shake that can occur when using handheld.
This helps to deliver impressively clear, up-close results. Used to add a unique emphasis to your imagery, the SA Control Ring allows the user to change the shape and character of the foreground and background bokeh.
A minus setting creates a dreamy, soft-focused look, while a Plus setting creates a bubble-bokeh-type look. A lock mechanism can be found on the side of the lens which locks the SA control ring to the middle position rendering standard, traditional operation, with no SA optical effects.
To obtain the desired effect, shooting with Aperture Priority AE is recommended. The effect of the SA control ring depends on the subject conditions subject and background, foreground distance, etc. This helps you quickly focus and keep up with fast-moving subjects as well as provides smooth and virtually silent autofocus while shooting movies, so there is relatively no disturbance for you, the subject or in what you see visually and hear audibly during shooting and playback.
With the Control Ring, you can directly adjust settings such as shutter speed, lens aperture, exposure compensation and more. For photographers and moviemakers who would prefer a silent control ring, the clicking mechanism can be removed by a Canon service provider for a fee. For reliable performance even when weather conditions get difficult, the RFmm F2. Sealing is applied to lens joining sections, and switch panels to help prevent water and dust from entering into the lens. View Full Specifications.
Expand All. Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you RFmm F2. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout.
Visit the Canon Online Store. It helps protect the front glass from dust and scratches. MSRP: Helps protect the front glass from dust and scratches. MSRP: 7. Lens hood ETC helps to block sunlight or other light sources to prevent glare and lens flare, as well as help protect the lens itself from scratches and the elements.
Sample Images More Details. The higher a curve is shown on the chart, the better the lens is performing in the area the chart is measuring.
As a curve moves from left to right, it displays the lens' results from center towards the corners. This lens is perfect for portraits, weddings, still life and even landscapes, and has an SA Spherical Aberration Control Ring that lets you change the look and style of the foreground and background blur. See how it all was done. Canon survey as of April 14, Testing performed using the EOS R camera. Testing performed using the EOS R5 camera.
Actual what is usm in canon lenses are determined by individual dealers and may vary. My Canon. Products Home. Network Cameras Software Solutions.
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Chrome A grey bar will appear at the bottom of your browser window which will contain your download. To install your download click on the name of the downloaded file. I have read and understand the information above, and wish to download the designated software. Get Product Support. Register Your Product. Available Colors :. Where To Buy. RFmm F2. Length, Approx. Weight Weighing approx. Photo by Dennis Prescott, Canon Ambassador.
Control Ring for Direct Setting Changes. Dust - and Weather-resistant. Dust - and Weather-resistant For reliable performance even when weather conditions get difficult, the RFmm F2.
Focal Length. Maximum and Minimum Aperture. Lens Mount Type. Minimum Focusing Distance. Maximum Magnification. Angle of View. Lens Construction. SA Spherical Aberration Control.
Special Elements. Lens Coating. Filter Size Diameter. Aperture Blades. IS Mode Selection. Image Stabilization. Maximum Outer Diameter x Length. Lens hood. Lens Cap. Dust Cap. Lens Case. Tripod Mount. Read More. Lens Case What is the meaning of continence Lens pouch cases are compact, yet keep your lenses looking like new.
Lens Hood ETC Lens hood ETC helps to block sunlight or other light sources to prevent glare and lens flare, as well as help protect the lens itself from scratches and the elements. Sample Images. More Details. Image 1. Image 2.
STM vs USM: Canon’s Lens Tech Explained
25 rows · Mar 24, · Canon’s latest invention of the USM lens series was the Nano USM. In , the EF-S mm. Jul 23, · USM (Ultrasonic Motor) This was the first Ultrasonic Motor technology introduced for AF lenses in the 90s by Canon. USM is the most widely used AF motor type in the Canon EF lens range to date. Common to all USM motors is the fact that that they convert ultrasonic vibration energy into rotational force to move the loveallfind.comted Reading Time: 7 mins. The Canon RFmm F L MACRO IS USM lens is the world’s first medium telephoto AF Macro lens with a maximum magnification of x (as of 4/14/21). This lens is perfect for portraits, weddings, still life and even landscapes with its Optical Image Stabilizer with up to 5 stops of shake correction, up to 8 stops when used in combination with.
It makes sense. What Canon shooters wanted most out of their AF systems was fast, reliable focus. Enter the USM or ultrasonic motor. But when more and more hobbyists started buying DSLRs for their video productions, Canon saw an opportunity to retool the autofocus system and introduce the STM or stepping motor that emphasized smoother focus pulling and quieter motor noise.
Today, STM lenses offer beginner videographers an alternative to heavier and more expensive USM glass built more specifically for their needs. As the name suggests, USM motors convert ultrasonic vibrations into the force required to rotate the focusing elements of the lens. What I can explain is that there are three types of USM motors:. The micro USM is the motor typically used in your everyday kit lens. You can think about the micro USM as the tiny little cheapskate of the family.
Cheaper to produce because they fit in a wide range of lenses regardless of barrel size, they are also loud little buggers. While you might expect an ultrasonic system which is literally any sound that is too high to hear by humans to be completely silent, the micro USM is actually quite noisy. If you have a kit lens on hand, pop it on your camera, switch it to autofocus and hear the mechanically whirring as it hunts for the focusing subject.
While the micro USM itself is silent, the coupling with cheaper-to-produce gears make the grinding sound that reminds me of a remote-controlled car. Ring-type USMs, on the other hand, work using ultrasonic energy to rotate rings uniquely designed to each lens. But the main takeaways are as follows:.
The nano USM is the newest and sleekest of the three. Released in , the nano USM is able to operate just as quickly as the ring-type while also achieving smooth and silent operation.
You can think about the nano USM as the sibling who Canon spoiled because they were the youngest child. Combining speed, silence, and smooth moves pretty much leaves the USM vs STM competition in the dust, but because the motor is still so new and limited to a small selection of lenses , the battle rages on.
Come future technology, bring us sweet decision-less peace. Fortunately, Canon brought us the STM. As you can imagine, anything with gears to grind is going to be noisy. But the lead screw types are where STMs shine. The motors achieve their lower noise levels by running or stepping back and forth along lead-screws within the barrel of the lens.
While not as quick as ring-type USMs, these motors move along the screw more gracefully, and quieter too. STM motors are typically found in lenses specifically marketed to amateur video shooters. The technology is cheaper to produce than USMs. Therefore, STM lenses tend to be more affordable. That said, even though they are meant for video purposes , they are still relatively fast to autofocus and can definitely still be used to capture terrific pictures. In summary, STM lenses are ideal for beginner video shooters on account of quiet motor noise and smooth autofocus pulls.
When you can afford an external mic and audio recorder , cheap as they may be, your production quality will take a huge leap forward while also shrinking the issue of motor noise. When your audio improves and you start earning more from your productions, a USM lens might start to look like the better option. Though the rack focus is slightly more jarring, the advanced optics and speedier motor can be a big deal for video shooters such as vloggers who rely heavily on autofocus functionality.
View Larger Image. The latest in bobsled helmet fashion. Motorized focus changes the game Enter the USM or ultrasonic motor. Micro ultrasonic motors. Ring-type USMs are powerful enough to hold the focusing lens in place when the motor is switched off allowing the shooter to switch seamlessly between auto and manual focus.
Ring-type motors start and stop quickly , ensuring fast response times. This is ideal for photography , but results in an abrupt rack focus for video. Ring-type USM. Nano Ultrasonic motor.
Lead screw-type STM. Share with Friends facebook twitter linkedin reddit tumblr pinterest Email. About the Author: Joel Edelblute. Joel has been editing to the beat of his own waveform for 8 years as a freelance videographer, but it still took a global pandemic to get serious writing. Related Posts. Wedding Videography Tips: 9 Life Lessons. Quiet motor noise Smooth rack focus More affordable. Slightly slower time to autofocus Manual focus is delayed Inferior lens quality. Noticeably noisy motor noise Abrupt rack focus Typically more expensive.