Low Pass Filter Pack
The low pass filter pack is situated in front of the sensor and contains an optical low pass filter, an infrared (IR) cut-off filter and an ultraviolet (UV) cut-off filter. The low pass filter blocks high image frequencies that would lead to artifacts when captured by the sensor. It is made from a modern, high performance crystal with optical properties that have been fine-tuned for a perfect match between the transmitted image content, the sensors pixel structure and the down-sampling algorithm in the camera. The result is the creation of super sharp yet natural HD and 2K DI images. The IR and UV cut-off filters let only those light frequencies reach the sensor which can be converted into a meaningful image. As with the D-21, the IR filter is specifically designed for the spectral response of the cameras sensor, so no additional IR filter in front of the lens is required.