Düzenleniyor Canon EF 17-40mm F4L USM

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Released in May 2003, The EF 17-40mm f/4L USM was created as a high-end version of the EF 20-35mm f/3.5-4.5 USM lens.

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== ***Identification*** ==

The model name "CANON ZOOM LENS EF 17-40mm 1:4 L USM" can be found around the front lens barrel.

== ***Technical Specifications*** ==

***General:***

* ***Focal Length:*** 17-40 mm
* ***Maximum Aperture:*** f/4
* ***Minimum Aperture:*** f/22
* ***Closest Focusing Distance:*** 0.28 m (0.9 ft)
* ***Maximum Magnification:*** 0.24 x (at 40 mm)

***Construction:***

* ***Lens Groups:*** 9
* ***Lens Elements:*** 12
* ***No. of Diaphragm Blades:*** 7 (circular aperture)

***Physical:***

* ***Lens Mount Type:*** Canon EF
* ***Filter Diameter:*** 77 mm
* ***Maximum Diameter x Length:*** 83.5 x 96.8 mm (3.3 x 3.8 in)
* ***Weight:*** 475 g (16.8 oz)

***Accessories:***

* ***Lens Cap:*** E-77U / E-77 II
* ***Lens Hood:*** EW-83E
* ***Case:*** LP1319
* ***Magnification - Extension Tube EF12 II:*** 0.83 - 0.32
* ***Magnification - Extension Tube EF25 II:*** 1.02 - 0.70

***Source:*** [link|https://global.canon/en/c-museum/product/ef373.html|Canon Camera Museum|new_window=true]

== ***Additional Information*** ==

[link|https://www.usa.canon.com/support/p/ef-17-40-f-4l-usm?srsltid=AfmBOoqYl91InjHv016g2RmCzCad5TBTRVSWD8qqOiU7pvNj7bG03-jf|Instruction Manual|new_window=true]

[link|https://en.wikipedia.org/wiki/Canon_EF_17-40mm_lens|Wikipedia: Canon EF 17-40mm lens]

[link|https://global.canon/en/c-museum/product/ef373.html|Canon Camera Museum|new_window=true]

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Instruction Manual

Parts Catalog

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