Comparison: Atlas Orion 21mm T2 2x vs Sirui 75mm T2.9 1.6x
| Atlas Orion 21mm T2 2x | Sirui 75mm T2.9 1.6x | |
 |  | |
| Brand | Atlas Lens Co. | Sirui |
| See Lowest Price | See Lowest Price |
| Atlas Orion 21mm T2 2x | Sirui 75mm T2.9 1.6x | |
| | |
| Brand | Atlas Lens Co. | Sirui |
| See Lowest Price | See Lowest Price |