Zeiss Ultra Prime 40mm T1.9 vs Canon EF 40mm f/2.8 STM
Zeiss Ultra Prime 40mm T1.9 vs Canon EF 40mm f/2.8 STM
When comparing Canon EF 40mm f/2.8 STM and Zeiss Ultra Prime 40mm T1.9, which one is better?
1. Largest Aperture Comparison
The Zeiss Ultra Prime 40mm T1.9 has the largest aperture of the two lenses at 1.9 compared to the 2.8 aperture of Canon EF 40mm f/2.8 STM. This means that you get more light to your sensor using Zeiss Ultra Prime 40mm T1.9 wide open, and therefore it might be a better lens in dark situations.
Winner: Zeiss Ultra Prime 40mm T1.9
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 Zeiss Ultra Prime 40mm T1.9 and Canon EF 40mm f/2.8 STM:
| Zeiss Ultra Prime 40mm T1.9 | Canon EF 40mm f/2.8 STM | |
 |  | |
| Brand | Zeiss | Canon |
| Lens Mount | Missing | Canon EF |
| Focal Length | 40 mm | 40 mm |
| Largest Aperture | 1.9 | 2.8 |
| Anamorphic | Missing | No |
| Type | Missing | Prime |