Focus Lens

Lens
Focus Abilities can be upgraded through the use of, which are earned through the use of a Focus Lens, a special item that converts 5.0% of Affinity earned to , before allocating the points to either warframe only, or split between warframe and weapon when using a weapon. Focus Lenses can only be installed on Rank 30 Warframes, Weapons, Archwings, and Archwing weapons. Only excess experience points gained after Rank 30 is converted to Focus points; if a Focus Lens-equipped item is polarized, the item will not convert Focus points until it has once again reached Rank 30. Items can only have one Focus Lens installed at any time; while players can swap an installed Focus Lens for another one, the previously installed Lens will be lost in the process. Currently, Focus Lenses can be acquired through completing Sortie missions, and can be traded between players, while Greater Lenses can also be bought with Platinum from the market.

The type of Focus earned is determined by the lens that is used. For example, installing a Lens on a Warframe will earn  Focus. Affinity earned through kills with a lens-equipped item beyond Rank 30 will go towards earning Focus, and will also take Stealth Attack Affinity bonuses into account. Warframes equipped with lenses can gain Focus points from kills made by their powers or weapons, while lens-equipped weapons can only earn Focus for direct kills. Focus points are converted before Affinity distribution mechanics are performed, i.e. a kill using Warframe powers earns 100% Affinity from said kill, thus recieving the full 5% Focus conversion, however weapon kills split Affinity in half between weapon and warframe, and thus the 5% Focus conversion is split between them, resulting in both weapon and warframe recieving only 2.5% Focus each per kill.

Affinity earned by other equipped weapons, affinity earned from kills made by teammates, and bonus affinity from completing objectives will not be converted into Focus. As of, Focus Points have an experimental limit of 75,000 per day.

Once earned, Focus can be spent by accessing the Focus menu on the Orbiter's Transference Room. Focus points can be spent to unlock a new school, unlock a new upgrade node in an existing school ability tree, upgrade an unlocked node, or increase the maximum Pool for a specific tree.

Greater Lens
Greater Lenses convert 7% (3.5% for weapons) of excess Affinity into Focus points, 40% more than a regular Focus Lens. Their blueprints can be obtained from the Components section of the Market for players who have completed the Second Dream quest. Complete Greater Lenses can also be bought from the Market for. Unlike with normal Focus Lenses, Greater Lenses cannot be traded.