- 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
- In retail white box
Spanning a versatile wide-angle range, the EF 17-40mm f/4L USM Lens is a Canon L-series zoom featuring a constant f/4 maximum aperture along with a sophisticated optical design and durable construction. One Super UD element is featured, along with three aspherical elements, which help to reduce both chromatic and spherical aberrations in order to realize high sharpness, clarity, and color accuracy. A Super Spectra coating has also been applied to suppress flare and ghosting for improved contrast in difficult lighting conditions. Complementing the imaging capabilities, this wide-angle zoom also features a ring-type USM and internal focusing mechanism to afford quick, quiet, and accurate autofocus performance, as well as a full-time manual focus override. Additionally, this lens is weather-sealed for use in trying environmental conditions.
- Wide-angle zoom is designed for full-frame Canon EF-mount DSLRs, however, can also be used with APS-C models where it provides a 27.2-64mm equivalent focal length range.
- Constant f/4 maximum aperture maintains consistent illumination throughout the zoom range.
- One Super Ultra-Low Dispersion glass element noticeably reduces color fringing and chromatic aberrations for high clarity and color fidelity.
- Three aspherical elements minimize spherical aberrations and distortions for improved sharpness and accurate rendering.
- Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.
- A ring-type Ultrasonic Motor (USM), along with an internal focusing system, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.
- The rounded seven-blade diaphragm contributes to a pleasing out-of-focus quality that benefits the use of shallow depth of field and selective focus techniques.
- As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.
- In addition to the front 77mm filter ring, this lens also has a rear filter holder for up to three cut gel filters.
If a deal seems too good to be true, it probably is.
Products which are imported and sold other than by Authorized Dealers are referred to as "Gray Market" (or "parallel") products. Camera Wholesalers will never sell you illegitimate products.
Camera Wholesalers are authorized retailer for:
- Canon http://downloads.canon.com/dealer/canon-ad-06-04-20.pdf
- Nikon https://cdn-6.nikon-cdn.com/where-to-buy/nikon_img_auth_dealers.pdf
- Sony https://www.sony.com/retailers
- Leica https://us.leica-camera.com/Stores-Dealers/Leica-dealer-locator
- Fujifilm https://stagewww.fujifilmusa.com/shared/bin/AUTHORIZED_DEALER_LIST.pdf
- Olympus https://www.olympusamerica.com/cpg_section/AuthorizedDealers.pdf
- Tamron https://www2.tamron-usa.com/dealers.aspx?alpha=C
- Sigma https://www.sigmaphoto.com/where-to-buy-sigma
- Manfrotto https://www.manfrotto.com/us-en/find-a-store/
- GoPro https://gopro.com/en/us/store-locator
- And many more
Why are Gray Market products risky?
No branded Warranty
- Gray Market products may contain a limited warranty from the seller, but they are not covered by a Canon/Nikon etc. USA warranty.
Not eligible for repair service
- Not eligible for USA repair service by the relevant brand, even if you want to pay for it.
- May include counterfeit or third party accessories that could damage your equipment.
Missing user manuals
- User manuals are often missing, incomplete or photocopied, and they may even be in a foreign language.
- The software included often is either copied or counterfeit.
May not be as expected
- Since Gray Market products were not designed for sale in the USA, they may not meet your expectations.
Wrong power cord
- May include an incorrect power cord or adapter not designated for use in the USA.
Not eligible for rebates
- Gray Market products are not eligible for USA promotions or instant rebates from the relevant brand.
Learn more on Nikon https://www.nikonusa.com/en/nikon-store/gray-market.page
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