has a silent focus motor built into the lens. Canon EF 17-40mm f/4L USM. Sigma 24-105mm F4 DG OS HSM A. Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor. minimum focus distance.
最大直径×长度 (mm) 约83.5 x 96.8. 重量 (g) 约475. EF17-40mm f/4L USM是1993年3月上市并广受好评的EF20-35mm f/3.5-4.5 USM镜头的高端版本。. 这款镜头面向专业和业余用户而设计，实现了L系列镜头的高分辨率，同时保持了高性价比。. 这款新镜头采用新的光学系统设计，将变焦
The 17-40 f/4, stopped down to f/8, appeared to perform incredibly well - better than my Nikon 24/2.8, better than the Canon 16-35 f/2.8, better than several primes. Admittedly, f/8 isn't that exciting, but it's where you use wide lenses on a tripod.
Let us know. Buy Canon EF 17-40mm f/4L USM Lens featuring EF-Mount Lens/Full-Frame Format, Aperture Range: f/4 to f/22, One Super Ultra-Low Dispersion Element, Three Aspherical Element, Super Spectra Coating, Ring-Type Ultrasonic Motor AF System, Weather-Sealed Construction, Rounded 7-Blade Diaphragm. Review Canon null.
Canon EF 16-35mm F4L IS USM Canon EF 17-40mm f/4.0L USM Canon EF 200-400mm f/4L IS USM Extender 1.4x Canon EF 200mm f/2.8L II USM Canon EF 200mm f/2L IS USM
キヤノンEF17-40mm F4L USMは、EOSカ特長メラ用の高性能広角ズームレンズです。. USMはUltrasonic Motor(超音波モーター)の略称です。. 用することにより、優れた描写性能を実現しています。. 2.超音波モーター(USM)搭載により、高速で静かなオートフォーカスを実現し
Canon EF series L USM Standard lens with an aperture of f/4 is compatible with Canon Digital SLR cameras. This Canon lens is capable of being used with Auto & Manual focus. It contains 12 elements in 9 groups and features a focal length of 40 mm. The lens is compatible with 77 mm filters. It has 8.4 cm diameter, 9.7 cm length and weighs 500 g.
The Canon EF 17-40mm f/4L USM Wide Angle Zoom is perfectly suited to professional digital imaging as well as use with 35mm and even APS SLRs. The optics are excellent, highlighted by three Aspherical lens elements, and one Super UD (Ultra-low Dispersion) glass element.
83.5 x 96.8. Weight (g) 475. The EF17-40mm f/4L USM was developed as high-end version of the highly acclaimed EF20-35mm f/3.5-4.5 USM lens released in March 1993. Designed for use by professional and amateur users alike, this lens realizes the outstanding image resolution that distinguishes an L-series lens while retaining high cost performance.
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canon ef 17 40mm f 4l usm price
