Comparison: Sirui 135mm T2.9 1.8x - (Sony E Mount) vs Sony FE 600 mm f4 GM OSS
| Sirui 135mm T2.9 1.8x - (Sony E Mount) | Sony FE 600 mm f4 GM OSS | |
 |  | |
| Brand | Sirui | Sony |
| See Lowest Price | See Lowest Price | |
| Vikt | - | 3040 |
| Sirui 135mm T2.9 1.8x - (Sony E Mount) | Sony FE 600 mm f4 GM OSS | |
| | |
| Brand | Sirui | Sony |
| See Lowest Price | See Lowest Price | |
| Vikt | - | 3040 |