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2. Canon EF 500mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_500mm_lens

   From left to right: EF 28-300mm f / 3.5-5.6L IS USM, 70–200 f / 2.8L IS USM, 300mm f / 2.8L IS USM, 500mm f / 4L IS USM. The EF 500mm lenses are a group of super-telephoto prime lenses made by Canon that share the same focal length. These lenses have an EF type mount, and fit the Canon EOS line of digital single lens reflex cameras.

3. The best Canon telephoto lenses in 2022: for your DSLR or EOS ...

   www.aol.com/news/best-canon-telephoto-lenses...

   The best Canon telephoto lenses for EF and RF mounts enable you to get up close to the action even from far away. ... Canon RF 100-500mm f/4.5-7.1L IS USM.

4. Canon Extender EF - Wikipedia

   en.wikipedia.org/wiki/Canon_Extender_EF

   When used with a compatible lens, they will multiply the focal length of the lens by a factor of either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 or 2 stops respectively. For example, using a 1.4x or 2x extender with the Canon EF 500mm f/4L IS USM would result in a 700mm f/5.6 or 1000mm f/8 lens.

5. Sigma 200-500mm f/2.8 EX DG lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_200-500mm_f/2.8_EX...

   The Sigma 200-500mm f/2.8 EX DG lens is a professional-level telephoto zoom lens made by Sigma Corporation. [1] It is notable for being the first lens with an aperture of f / 2.8 and a focal length of 500mm. [2] This combination allows very distant objects to be photographed at high shutter speeds in dimmer light, compared to other telephoto ...

6. Telephoto lens - Wikipedia

   en.wikipedia.org/wiki/Telephoto_lens

   The term telephoto ratio refers to the physical length of a lens divided by its focal length; where long-focus lenses have a telephoto ratio around 1, telephoto lenses have a ratio less than 1. As an example, one modern lens ( Canon EF 400 mm f /4 DO IS ) achieves a telephoto ratio of 0.58 in part due to a front (converging) lens group which ...

7. Canon EF 1200mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_1200mm_lens

   The EF 1200 mm f / 5.6 L USM is a super-telephoto prime lens that was made by Canon Inc. It uses an EF mount, and is compatible with the Canon EOS camera range. It has a focal length of 1200 mm and so on a digital body with a sensor size of 22.5 mm × 15 mm (called 1.6× crop), such as a Canon EOS 40D or 450D, it provides a 35 mm field of view equivalent to that of a 1920 mm lens.