 |
|
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 with Teleconverters | No |
| Zoom Ratio | 2.3x |
| Maximum Reproduction Ratio | 1:4.1 |
| Vibration Reduction / Image Stabilization | No |
| Aperture Information | |
| Aperture Ring | No |
| Maximum Aperture | f/4 |
| Minimum Aperture | f/22 |
| Maximum Angle of View (Full Frame format) | 104°-57° |
| Minimum Angle of View (Full Frame format) | N/A |
| Optical Information | |
| Lens Elements | 12 |
| Lens Groups | 9 |
| Diaphragm Blades | 7 |
| Super Integrated / Super Spectra Coating | Yes |
| Focus Information | |
| Focus | Autofocus |
| Built-in Focus Motor | Yes |
| Silent Wave / Ultrasonic Motor | Yes |
| Internal Focusing | Yes |
| Rear Focusing | No |
| 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 |
| Tripod Collar | No |
| Dimensions | 8.38 x 9.65cm |
| Weight | 476g |
| Other Information | |
| Available in Colors | Black |
Construction
MTF Chart
User Review Policy: All user reviews are moderated. If you would like your review to be posted, please make sure that there is enough valuable information for others to read. Two or three word reviews will be deleted. Also, please do not forget to give a star ranking to the reviewed product. Thank you!