- Fast T1.5 wide-angle lens
- Full-frame, 35mm-sized coverage
- Geared focus and aperture rings
- "Declicked" aperture ring for smooth iris pulls
- Aspherical lens elements and UMC multi-coating
- Focal Length 24mm
- Mount Canon EF-Mount
- Aperture Maximum: T1.5
- Minimum: T22
- Iris Blades 8
- Angle of View Full Frame: 84.1°
- 1.5x APS-C Crop: 61.8°
- 1.6x APS-C Crop: 57.6°
- Minimum Focus Distance 9.84" (25.00 cm)
- Lens Construction 13 elements in 12 groups (4 elements low-dispersion glass, 2 Aspheric elements)
- Filter Diameter 77mm
- Dimensions 3.27 x 3.84" (8.30 x 9.75 cm)
- Weight 21.7 oz (615.0 g)