EF 40mm f/2.8 STM – key features
- Portable pancake design
- Smooth, quiet STM focusing when shooting movies on compatible cameras
- Fast f/2.8 maximum aperture for low-light shooting
- Close focus to 0.3m
- Fast, quiet AF for pin-sharp results
- Great image quality right across the frame
Canon EF 40mm STM specifications
| Principal specifications | |
|---|---|
| Lens type | Prime lens |
| Max Format size | 35mm FF |
| Focal length | 40 mm |
| Image stabilisation | No |
| Lens mount | Canon EF |
| Aperture | |
| Maximum aperture | F2.8 |
| Minimum aperture | F22.0 |
| Aperture ring | No |
| Number of diaphragm blades | 7 |
| Optics | |
| Elements | 4 |
| Groups | 6 |
| Focus | |
| Minimum focus | 0.30 m (11.81") |
| Maximum magnification | 0.18 x |
| Autofocus | Yes |
| Motor type | Stepper motor |
| Full time manual | Yes |
| Focus method | Internal |
| Distance scale | No |
| DoF scale | No |
| Physical | |
| Weight | 130 g (0.29 lb) |
| Diameter | 68 mm (2.68") |
| Length | 27 mm (1.06") |
| Sealing | No |
| Colour | Black |
| Filter thread | 52 mm |
| Tripod collar | No |
