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

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

   (Image credit: Future/Digital Camera World) 2. Canon RF 24-240mm f/4-6.3 IS USM. The best all-rounder when you just want to carry one lens. Mount: Canon RF | Autofocus: Nano Ultrasonic ...

3. Pentax DA 560mm lens - Wikipedia

   en.wikipedia.org/wiki/Pentax_DA_560mm_lens

   As of July 2015, the Pentax HD DA 560mm F5.6 ED AW is the longest prime lens in production under the Pentax brand. It has a telescope-type optical design. [1] The lens is fully compatible with the K-1 full-frame DSLR and covers the 35mm image circle. On the K-1, lens correction profiles are supported to remove chromatic aberrations and ...

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

   en.wikipedia.org/.../2.8_EX_DG_lens

   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 ...

5. Telephoto lens - Wikipedia

   en.wikipedia.org/wiki/Telephoto_lens

   A telephoto lens, also known as telelens, is a specific type of a long-focus lens used in photography and cinematography, in which the physical length of the lens is shorter than the focal length. [ 1 ] : 93 This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens ...

6. Questar Corporation - Wikipedia

   en.wikipedia.org/wiki/Questar_Corporation

   See duplex option below. This was first offered for sale in May 1956. A 3.5" Duplex, optically and mechanically identical to the Standard, but which included a simple way of detaching the telescope from the open fork mount to allow the optical tube assembly (OTA) to be used as a 1240 mm at f12 telephoto lens. This variant has been in production ...

7. Jupiter (lenses) - Wikipedia

   en.wikipedia.org/wiki/Jupiter_(lenses)

   Jupiter-21 200 mm f /4.0 lens. Jupiter-21 is a telephoto lens with focal length of 200mm. Its maximum aperture is f/4.0. The lens was made in multiple mounts and is frequently adapted to modern cameras nowadays. There are multiple versions of the lens. The most common one is the Jupiter-21M, which has M42 mount. But there were also versions ...