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2. Canon EF-S 18–135mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF-S_18–135mm_lens

   A new version of the lens, the f/3.5–5.6 IS STM, was announced on 8 June 2012, alongside the EOS 650D/Rebel T4i/Kiss X6i.The "STM" stands for "Stepping Motor", a new autofocus technology claimed by Canon "to smoothly and silently focus" and "achieve continuous AF while recording video" when used with the 650D (and presumably future Canon bodies). [1]

3. Canon EF 24-105mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_24-105mm_lens

   Both lenses have image stabilization (IS). The EF 24–105mm f/4L IS USM and IS II USM version use a ring type ultrasonic motor, whereas the new EF 24-105mm f/3.5-5.6 IS STM uses Canon's STM stepper motor, which is quieter during video usage. The new EF 24-105mm f/3.5-5.6 IS STM weighs slightly less (525 g / 18.52 oz versus 670 g / 23.6 oz) and ...

4. Canon EF 24mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_24mm_lens

   As it is designed for Canon APS-C bodies, its field of view is equivalent to a 38mm lens on a full-frame sensor, and operates similar to the Canon EF 40mm f/2.8 STM pancake lens. Compared to the EF 24 f / 2.8 IS USM, the EF-S lens loses IS, but lists for about a fourth of the

5. Canon EF-S 18–55mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF-S_18–55mm_lens

   The 18–55mm USM lens. The Canon EF-S 18–55mm lens f / 3.5–5.6 is a Canon-produced wide-angle to mid telephoto zoom lens for digital single-lens reflex cameras with an EF-S lens mount. The field of view has a 35 mm equivalent focal length of 28.8–88mm, and it is a standard kit lens on Canon's consumer APS-C DSLRs.

6. Canon EF lens mount - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_lens_mount

   Ultrasonic motor (USM) lenses appeared with the introduction of the EF 300 mm f / 2.8L USM lens in 1987. Canon was the first camera maker to successfully commercialise the USM technology. EF lenses equipped with USM drives have fast, silent and precise autofocus operations, and consume less power compared to other AF drive motors.

7. Canon EF 24–70mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_24–70mm_lens

   The consumer version is also image-stabilized, but replaces the USM motor drive with STM, has a variable maximum aperture, and also lacks a macro feature. Canon EF 70–200mm lens has both image-stabilized and non-IS versions with maximum apertures of f/2.8 and f/4.0, and continues the 24–70mm's maximum focal length through 200mm