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H-alpha modification

Canon cameras are modified by removing the LPF2 filter to open the sensor to H-alpha light. The LPF1 filter is retained and it acts as a UV/IR cut filter and the dust removal tool. The sensor position is precisely calibrated afterwards to allow for the internal autofocus system to work properly.

Full spectrum modification

For a full spectrum modification, all filters in front of the sensor are removed to open it to the entire light spectrum, including UV and IR. External filters with UV/IR cut capability are required for this modification type. Popular camera models for this modification – Nikon D5300/D5500/D5600, any Canon camera.

Infrared modification

Canon APS-C sized cameras are modified by removing both the LPF1 and LPF2 filters and replacing them with a high quality 720nm IR filter. Afterwards, the sensor position is precisely calibrated to allow for the internal autofocus system to work properly. Since the dust reduction element is a part of the LPF1 filter, it is also removed with the filter.