Zeiss Ultra Prime 40mm T1.9 vs Zeiss Sonnar T* E 55 mm f1,8 ZA
Zeiss Ultra Prime 40mm T1.9 vs Zeiss Sonnar T* E 55 mm f1,8 ZA
When comparing Zeiss Sonnar T* E 55 mm f1,8 ZA and Zeiss Ultra Prime 40mm T1.9, which one is better?
1. Largest Aperture Comparison
The Zeiss Sonnar T* E 55 mm f1,8 ZA has the largest aperture of the two lenses at 1.8 compared to the 1.9 aperture of Zeiss Ultra Prime 40mm T1.9. This means that you get more light to your sensor using Zeiss Sonnar T* E 55 mm f1,8 ZA wide open, and therefore it might be a better lens in dark situations.
Winner: Zeiss Sonnar T* E 55 mm f1,8 ZA
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 Zeiss Sonnar T* E 55 mm f1,8 ZA:
| Zeiss Ultra Prime 40mm T1.9 | Zeiss Sonnar T* E 55 mm f1,8 ZA | |
 |  | |
| Brand | Zeiss | Zeiss |
| Weight | Missing | 281 g |
| Lens Mount | Missing | Sony E |
| Focal Length | 40 mm | 55 mm |
| Largest Aperture | 1.9 | 1.8 |
| Anamorphic | Missing | No |
| Minimum Focus Distance | Missing | 50 cm |
| Type | Missing | Prime |
| Lens Front Diameter (Not Filter Thread) | Missing | 49 mm |
| Aperture Blades | Missing | 9 |