Focus cannon

Focus cannons, or focus beams, are a classification of heavy plasma weaponry used by the Covenant and its remnants.

Design details
Focus cannons are a type of energy projector similar to the capital-grade models used on Covenant starships. They can be individually tuned to allow for fine-excavation of Forerunner reliquaries or massive destruction of enemy ground forces.

The exact specifics on the operation of focus cannons are vague; while classed as a large type of plasma cannon, they generally operate by firing continuous streams of plasma at their targets - usually in a yellow-green colouration as opposed to the blue-red-purple of standard plasma weapons. As a form of energy projector, they presumably utilise the same magnetic confinement and anti-gravity technology to contain the plasma streams. A similar operation can be observed in the infantry-held - with a similar beam colouration and operating mechanism.

The plasma streams fired bear great resemblance to the assault cannons of the Mgalekgolo, though it is unknown to what degree the two technologies are related. Some focus cannons, such as those of the, can be observed dripping some kind of green, glowing fluid after firing - indicating that they may additionally use incendiary gel in their operation similar to the aforementioned assault cannons. Some models of focus cannon can be modified to support the injection and firing of infusion gel (itself a derivative of incendiary gel), further lending credence to this implication.

Variants

 * Bloodfuel beam: a special variant of light focus cannon equipped on the Bloodfuel variant of the Locust walker used by the Banished.
 * Infused focus cannon: a specially modified focus cannon created by Voridus to fire and spread infusion gel.

Usage

 * Ultra-heavy focus cannons
 * - 1x ultra-heavy focus cannon - considered to be one of the most powerful ever fielded on a combat walker
 * - 1x ultra-heavy focus cannon
 * - 1x ultra-heavy focus cannon
 * - 1x ultra-heavy focus drill
 * Type-29 Scarab - 1x focus cannon - considered to be the most powerful of all known Scarab types


 * Heavy focus cannons
 * Barukaza Workshop Scarab - 1x heavy focus cannon
 * - 5x heavy focus cannons


 * Light focus cannons
 * - 1x light focus cannon (alternatively termed a "charged plasma cannon")
 * Barukaza Workshop Locust - 1x light focus cannon

The "light"/"heavy" classification of focus cannon (if any) for the following weapons is unknown, meaning where they are placed in the hierarchy of focus cannon power is presently unknown.
 * Undefined
 * - 1x Emim-pattern focus beam
 * Eklon'Dal Workshop Lich - 1x focus cannon
 * - 1x focus cannon (select "Beam Goblin" variants-only)

List of appearances

 * Halo 2
 * Halo 3
 * Halo Wars
 * Halo 3: ODST
 * Halo: Reach
 * Halo 2: Anniversary
 * Halo 5: Guardians
 * Halo Wars 2
 * Winter Contention