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2. 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 ...

3. List of longest smartphone telephoto lenses - Wikipedia

   en.wikipedia.org/wiki/List_of_longest_smartphone...

   This is a list of smartphones with a telephoto lens that offers a focal length (35mm equivalent) of at least 100mm or "4× optical zoom" with an imaging area equivalent to a 1/3.5″ or larger sensor. Smartphone lenses are often marketed in terms of "optical zoom" [1] relative to the phone's main camera. For example, 120mm is usually referred ...

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

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   5. Canon RF 70-200mm f/4L IS USM. The smallest full-frame 70-200mm and is incredibly sharp and lightweight. Mount: Canon RF | Full-frame compatible: Yes | Autofocus type: Dual Nano USM ...

5. The best Nikon telephoto lenses in 2022: from budget buys to ...

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   We pick out the best Nikon telephoto lenses for DSLRs and Nikon Z cameras, covering every price range and focal length The best Nikon telephoto lenses in 2022: from budget buys to pro lenses, DSLR ...

6. Long-focus lens - Wikipedia

   en.wikipedia.org/wiki/Long-focus_lens

   As with other types of camera lenses, the focal length is usually expressed in a millimeter value written on the lens, for example: a 500 mm lens. The most common type of long-focus lens is the telephoto lens, which incorporate a special lens group known as a telephoto group to make the physical length of the lens shorter than the focal length. [4]

7. The best budget telephoto lenses for Canon, Nikon, Sony and ...

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

   We pick the best budget telephoto zoom lenses for your camera system – big magnifications, small outlays! The best budget telephoto lenses for Canon, Nikon, Sony and more in 2022 Skip to main ...