Bosch 4-13mm Varifocal P-Iris Megapixel Lens, CS Mount

As cameras can now capture even higher picture resolutions through the use of megapixel sensor technology and advanced processing, the lenses also need to have an optical resolution that allows the camera to work at its optimal point.

System overview
This P-iris lens allows the camera to determine the optimal operating parameters to achieve the best possible image while alleviating the problem of diffraction that often occurs with megapixel sensors. The lens has a standard CS mount for use with a variety of cameras. The mechanical construction is designed to withstand the environmental stress of surveillance installations and provides long and reliable operation with no maintenance.

Functions
P-iris lenses have many advantages over standard DCiris lenses and are most valuable in variable lighting conditions. They allow control of the iris to be passed completely to the camera. The firmware in cameras from Bosch is then able to intelligently control the iris opening. The stepper motor in a P-iris lens is very precise which means that the iris opening can be set exactly as required.

The camera ensures that the iris opening is not too small so that un-sharp images caused by diffraction are avoided, but still maintains the required depth of field so that objects of interest remain in focus.