The Pentax C27509KA is a 75 mm f/1.4 C-mount lens for specialty 1-inch CCD industrial cameras. It shows a 9.5° horizontal angle view. Both the aperture and focus rings can be locked into place so settings won't change once mounted on the camera even with vibrations and camera movements.
Locking Iris Ring
The variable iris has a maximum aperture of f/1.8. This ring can be locked into place so that vibration or motion doesn't change your required setting.
Narrow View with Details
This 75 mm lens will produce narrow yet detailed views of your scene. When mounted on a 1-inch CCD camera the C27509 produces a 9.5° horizontal angle view with a 7° vertical angle.