The Pentax C-mount Manual Iris Lens (1") has a fixed focal length of 25.0mm and a back focal length of 15.80mm. The manual iris lens has a f/1.8 iris aperture and offers a horizontal viewing angle of 28.95°, with the minimum required object distance from the lens's image plane being 0.6m. The male thread of the C-mount lens mates with the female thread of the camera, ensuring rigidity. Locking screws make it compatible with both C- and CS-mount cameras.
- Fixed focal length of 25.0mm
- Back focal length of 15.80mm
- f/1.8 iris aperture
- Minimum object distance from the lens's image plane - 0.6m
- Horizontal viewing angle - 28.95°