11 hours ago
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The Canon EF 40mm F2.8 STM is a very slim, very lightweight pancake-style prime lens for both full-frame and APS-C Canon DSLR cameras. It features a stepper motor for fast, quiet focus, particularly important with the contrast-detection method of autofocus used for live view and video. Its optical construction includes an aspherical element and coatings optimized to reduce flare. Its closest focus distance is a mere 30cm, and a circular 7-bladed aperture ensures pleasant rendition of out of focus areas.
| Lens type | Prime lens |
| Focal length | 40 mm |
| Image stab. | No |
| Lens mount | Canon EF |
| Max aperture | F2.8 |
| Min aperture | F22.0 |
| Min focus | 0.30 m (11.81″) |
| Max magnification | 0.18 x |
| Weight | 130 g (0.29 lb) |
| Length | 27 mm (1.06″) |
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 | 24.1 megapixels 3″ screen APS-C sensor |
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