Sirui 135mm T2.9 1.8x (Sony E Mount) vs Sony E 70-350mm f4,5-6,3 G OSS
Sirui 135mm T2.9 1.8x (Sony E Mount) vs Sony E 70-350mm f4,5-6,3 G OSS
When comparing Sony E 70-350mm f4,5-6,3 G OSS and Sirui 135mm T2.9 1.8x (Sony E Mount), which one is better?
1. Lens Mount Comparison
These two lenses use the same lens mount, the Sony E. This means that both lenses are compatible with cameras that use this mount.
Winner: Tied
Regarding lens mount: Popular lens mounts are Canon RF and EF, Micro Four Thirds and Nikon Z. Different lens mounts lets you connect different lenses to camera bodies, but some might not be compatible. This can be helped by using an adapter, like a Canon EF to RF adapter.
2. Largest Aperture Comparison
The Sirui 135mm T2.9 1.8x - (Sony E Mount) has the largest aperture of the two lenses at 2.9 compared to the 4.5 - 6.3 aperture of Sony E 70-350mm f4,5-6,3 G OSS. This means that you get more light to your sensor using Sirui 135mm T2.9 1.8x - (Sony E Mount) wide open, and therefore it might be a better lens in dark situations.
Winner: Sirui 135mm T2.9 1.8x (Sony E Mount)
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 Sirui 135mm T2.9 1.8x (Sony E Mount) and Sony E 70-350mm f4,5-6,3 G OSS:
| Sirui 135mm T2.9 1.8x - (Sony E Mount) | Sony E 70-350mm f4,5-6,3 G OSS | |
 |  | |
| Brand | Sirui | Sony |
| Lens Mount | Sony E | Sony E |
| Focal Length | 135 mm | 70 - 350 mm |
| Largest Aperture | 2.9 | 4.5 - 6.3 |
| Anamorphic | Yes | Missing |
| Anamorphic Squeeze Factor | 1.8 | Missing |
| Type | Missing | Zoom |
| Image Stabilization | Missing | Yes |
| Full Frame Coverage | Missing | Yes |
| Lens Hood Included | Missing | Yes |
| Stabilization Type | Missing | Sony Optical SteadyShot (OSS) |