Comparison: Sigma 135mm F1.8 DG HSM - Sony vs Atlas Orion 21mm T2 2x
| Sigma 135mm F1.8 DG HSM - Sony | Atlas Orion 21mm T2 2x | |
 |  | |
| Brand | Sigma | Atlas Lens Co. |
| See Lowest Price | See Lowest Price | |
| Vikt | 1130 | - |
| Sigma 135mm F1.8 DG HSM - Sony | Atlas Orion 21mm T2 2x | |
| | |
| Brand | Sigma | Atlas Lens Co. |
| See Lowest Price | See Lowest Price | |
| Vikt | 1130 | - |