Canon CN-E 14mm T3.1 L F vs Canon EF 40mm f/2.8 STM
Canon CN-E 14mm T3.1 L F vs Canon EF 40mm f/2.8 STM
When comparing Canon EF 40mm f/2.8 STM and Canon CN-E 14mm T3.1 L F, which one is better?
1. Largest Aperture Comparison
The Canon EF 40mm f/2.8 STM has the largest aperture of the two lenses at 2.8 compared to the 3.1 aperture of Canon CN-E 14mm T3.1 L F. This means that you get more light to your sensor using Canon EF 40mm f/2.8 STM wide open, and therefore it might be a better lens in dark situations.
Winner: Canon EF 40mm f/2.8 STM
Regarding largest aperture: A lower aperture number means that the widest aperture on the lens is larger. This means that more light will hit the sensor and also that the depth of field will be shallower, better separating your subject from the background.
Specifications
Full specifications table of Canon CN-E 14mm T3.1 L F and Canon EF 40mm f/2.8 STM:
| Canon CN-E 14mm T3.1 L F | Canon EF 40mm f/2.8 STM | |
 |  | |
| Brand | Canon | Canon |
| Lens Mount | Missing | Canon EF |
| Focal Length | 14 mm | 40 mm |
| Largest Aperture | 3.1 | 2.8 |
| Anamorphic | Missing | No |
| Type | Missing | Prime |