Английская Википедия:Canon EF 17-40mm lens
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Original research Шаблон:Infobox photographic lens
The EF 17–40mm Шаблон:F/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from Шаблон:F/4 to Шаблон:F/8. It is one of the few Canon photo lenses that are parfocal.[1]
Audience
The 17–40mm is the least expensive of Canon's current wide-angle zooms for full-frame bodies,Шаблон:Refn with the [[Canon EF 16–35mm lens|EF 16–35mm Шаблон:F/4L IS USM]] and [[Canon EF 11–24mm lens|EF 11–24mm Шаблон:F/4L USM]] being more expensive, and the [[Canon EF 16–35mm lens|EF 16–35mm Шаблон:F/2.8L USM]] being both faster and more expensive. Weighing 475 g and measuring 83.5 mm x 96.8 mm, it is a popular choice with many photographers because of its light and compact size.[2] A member of the L-series, the 17–40mm is a good substitute for the 16–35mm Шаблон:F/2.8 lens, which is heavier and costs approximately twice as much. Canon now sells an image-stabilized 16–35mm Шаблон:F/4 lens for about $300 more than the 17–40.
This lens is also a popular step up from the stock kit lens on many of Canon's EOS Digital family of cameras, the [[Canon EF-S 18–55mm lens|EF-S 18–55mm Шаблон:F/3.5–5.6]], for those still wanting a wide angle lens. On a cropped sensor, it has 35 mm equivalent focal length of 27–64mm. In this role, it is compared with the EF-S 17–55mm lens, with which it can unofficially share lens hoods.
Companion lenses
This lens is often paired with an L series telephoto lens, such as the [[Canon EF 28–300mm lens|EF 28–300mm Шаблон:F/3.5–5.6 L USM]] or any of the EF 70–200mm family (Шаблон:F/4L USM, Шаблон:F/4L IS USM, Шаблон:F/2.8L USM, Шаблон:F/2.8L IS USM, Шаблон:F/2.8L IS II USM).
Images
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With the provided lens hood.
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Weather-sealed lens mount with rear gelatin holder.
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Diagram of the lens, highlighting its different controls and features.
References
External links
