Manual-iris lenses are applicable to places where a small variation in lighting takes place. All of our lenses with manual irises are available in CS mount. Lenses with Manual Iris   Focal Length Product f=2.8 ~ 10 mm 2810MI f=3.5 ~ 8 mm 358MI f=4.0 ~ 16 mm 416MI f=5.0 ~ 50 mm 550MI