Lens Summary
Brand: Canon
Also Known As: Canon 17-40mm f/4L
Lens Type: Zoom Lens
Format: Full Frame / FX
Focus: Autofocus
Lens Mount: Canon EF
Release Date: 2003-02-27
MSRP Price: $750
Made in: Japan
Infrared Rating: Mixed
Production Status: In Production
Lens Description: A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses
Canon EF 17-40mm f/4L USM Specifications
| Lens Specifications | |
|---|---|
| Lens Type | Zoom Lens |
| Focal Length | 17-40mm |
| Mount Type | Canon EF |
| Format | Full Frame / FX |
| Compatible Format(s) | 35mm / Full Frame |
| Compatible with Teleconverters | No |
| Zoom Ratio | 2.3x |
| Maximum Reproduction Ratio | 1:4.1 |
| Image Stabilizer (Image Stabilization) | No |
| Aperture Information | |
| Aperture Ring | No |
| Maximim Aperture | f/4 |
| Minimum Aperture | f/22 |
| Maximum Angle of View (Full frame or larger format) | 104°-57° |
| Optical Information | |
| Lens Elements | 12 |
| Lens Groups | 9 |
| Diaphragm Blades | 7 |
| Super Spectra Coating | Yes |
| Focus Information | |
| Focus | Autofocus |
| Built-in Focus Motor | Yes |
| UltraSonic Motor (USM) | Yes |
| Internal Focusing | Yes |
| Minimum Focus Distance | 0.28m |
| Distance Information | Yes |
| Filter Information | |
| Filter Size | 77mm |
| Accepts Filter Type | Screw-on |
| Physical Characteristics | |
| Weather / Dust Sealing | Yes |
| Mount Material | Metal |
| Dimensions | 8.38 x 9.65cm |
| Weight | 476g |
| Other Information | |
| Available in Colors | Black |
Construction
MTF Chart
