A Blacksun Filter is an advanced optical filtering suite employed by Tau military units that enhances and magnifies a warrior’s low-light vision whilst simultaneously filtering out bright flares of light that could blind the user in battle. With Blacksun Filters, target calibration systems sensors can also lock onto enemies with full efficiency and range even during night-fighting operations. This has proved to be a major advantage for Tau forces in many campaigns, where surprise night attacks can be conducted with full efficiency upon unsuspecting enemy forces. All Tau Battlesuit primary sensor clusters are fitted with Blacksun Filters as standard. Tau skimmers and aircraft can also be upgraded with Blacksun Filter systems as necessary to meet the particular tactical demands of their intended mission.
Sources
- Codex: Tau (3rd Edition), pp. 18, 20
- Codex: Tau Empire (4th Edition), pp. 26, 28, 30
- Codex: Tau Empire (6th Edition), pp. 68, 70, 72
- Imperial Armour: Aeronautica, pp. 58-64