不锈钢可变光栏可用于环境稳定的场合，采用不锈钢叶片和调节杆，发黑黄铜构架，这种结构在一般环境下不会生锈或腐蚀，调节杆从最大调到最小孔径时转动的角度约为90°.除了光学方面的应用，本品也可用于流体控制。
注意： 可变光圈安装座单独出售。
| Dimensions given for unmounted irises | |||||
| Outside Diameter A | Maximum Aperture B | Minimum Aperture C | Thickness D | Stock No. | |
| Unmounted | Mounted | ||||
| 14.8 | 8.0 | 0.8 | 4.5 | #62-650 | — |
| 19.8 | 12.0 | 0.9 | 5.0 | #53-910 | #62-657 |
| 24.0 | 15.0 | 0.9 | 5.0 | #64-501 | — |
| 28.0 | 18.0 | 0.9 | 5.0 | #62-651 | — |
| 30.0 | 20.0 | 0.9 | 5.5 | #64-502 | — |
| 33.0 | 22.0 | 0.9 | 5.5 | #64-503 | — |
| 37.0 | 25.0 | 0.9 | 5.5 | #53-911 | #62-658 |
| 40.0 | 28.0 | 1.3 | 5.5 | #64-504 | — |
| 50.0 | 36.0 | 1.6 | 6.0 | #64-505 | — |
| 53.0 | 37.0 | 1.6 | 6.0 | #53-912 | #62-659 |
| 70.0 | 50.0 | 2.8 | 7.5 | #53-913 | #62-660 |
| 100.0 | 75.0 | 5.5 | 9.0 | #62-652 | — |
| |||||