| Model Name | 21mm F1.4 ED AS UMC CS | |
| Aperture Range | F1.4 ~ F22 | |
| Optical Construction | 8 ELEMENTS IN 7 GROUPS (3ASPHERICAL LENSES) | |
| Minimum Focusing Distance | 0.28 m(0.92ft) | |
| Filter Size | 58.0mm | |
| Maximum Diameter | 64.3mm | |
| Mount | Canon M | |
| Angle Of View | APS-C | 66.4° |
| FOUR-THIRDS | - | |
| Length | 67.5mm | |
| Weight | 275g |