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2. Lenses for SLR and DSLR cameras - Wikipedia

   en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR...

   EF-S lenses can be distinguished by a white dot on the mount ring, as opposed to the red dot seen on standard EF lenses. Note that while an EF-S lens cannot be mounted on a camera that uses the EF mount, EF lenses can be mounted on cameras designed for the EF-S standard: for this reason, EF-S cameras carry both a red dot and a white dot on the ...

3. Sigma 30mm F2.8 EX DN - Wikipedia

   en.wikipedia.org/wiki/Sigma_30mm_F2.8_EX_DN

   The Sigma 30mm F2.8 EX DN is a standard prime lens for Sony E and Micro Four-Thirds mounts, announced by Sigma in January 2012. Along with the Sigma 19mm F2.8 EX DN, it was part of the first release of Sigma lenses for compact interchangeable lens cameras, and hence the inception of the "DN" line, created by Sigma to cater to these cameras, [1] an offering that in January 2013 was expanded ...

4. Canon EF 100-400mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_100-400mm_lens

   The EF 100–400 mm f / 4.5–5.6L IS USM is a professional EF mount telephoto zoom lens manufactured by Canon Inc. The first version of this lens was announced in September 1998, and an updated version was announced in November 2014. It is a high performance telephoto lens most often used for sports and wildlife photography.

5. Tripod head - Wikipedia

   en.wikipedia.org/wiki/Tripod_head

   A tripod head is the part of a tripod system that attaches the supported device (such as a camera) to the tripod legs, and allows the orientation of the device to be manipulated or locked down. Modular or stand-alone tripod heads can be used on a wide range of tripods, allowing the user to choose which type of head best suits their needs.

6. Sigma Corporation - Wikipedia

   en.wikipedia.org/wiki/Sigma_Corporation

   Kazuto Yamaki (CEO of Sigma) on 25 September 2018 at photokina in Cologne. Sigma Corporation (株式会社シグマ, Kabushiki-gaisha Shiguma) is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan. Although ...

7. Canon EF 500mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_500mm_lens

   Features of this lens are: a wide rubber focus ring that is damped, a distance window with infrared index, the ability to limit the focus range from: 4.5m to infinity, 4.5m to 10m, and 10m to infinity, it also has a focus-preset mechanism, an image stabilizer that is effective up to two stops and is tripod sensing, an AF stop switch, and ...