A Blacksun Filter is a Tau technology commonly employed by a variety of Tau units. Blacksun Filters are advanced optical filtering suites that enhance and magnifies a warrior’s low-light vision whilst simultaneously being able to filter 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 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 Battlesuits are fitted with Blacksun Filters as standard in their primary sensor clusters. All Tau skimmer vehicles and flyers can also be upgraded with Blacksun Filter systems as necessary to suit 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