Description
EF28mm f/1.8 USM
This is a large aperture lens that provides impressively natural delineation and beautiful shading, as well as excellent performance for indoor photography taking advantage of the bright maximum aperture of f/1.8. The optical system incorporates aspherical lenses, which not only keep the lens size down but also reduce spherical aberration and deliver sharp picture quality. A flare-cut diaphragm installed behind group 1 blocks unwanted light to ensure highest contrast. Operability is enhanced by inclusion of a ring-type USM for silent, high-speed AF with full-time manual focus and a non-rotating filter mount.
- Focal length and maximum aperture : 28 mm 1:1.8
- Lens construction : 10 elements in 9 groups
- Diagonal angle of view : 75°
- Focus adjustment : Ring-type USM, rear focusing system, full-time manual focus
- Closest focusing distance : 0.25 m/ 0.8 ft., 0.18 x magnification
- Filter size : 58 mm
- Max. diameter x length, weight : ø 73.6 x 55.6 mm, 310 g/ 2.9” x 2.2”, 10.9 oz.
SPECIFICATIONS
| Angle of View (Diagonal) | 75° | ||
| Angle of View (Horizontal) | 65° | ||
| Angle of View (Vertical) | 46° | ||
| Closest Focusing Distance (m, ft) | 0.25/0.8 | ||
| Construction (groups elements) | 9-10 | ||
| Diameter x Length (mm) (Max.) | 73.6 x 55.6 | ||
| Distance Scale | o | ||
| Drive System | Ring-type USM | ||
| Filter Size (mm) | 58 | ||
| Max. Magnification (x) | 0.18 | ||
| Min. Aperture | 22 | ||
| No. of Diaphragm Blades | 7 | ||
| Anti-dust and Moisture | Not Supported | ||
| Weight (g) (Approx.) | 310 |
