Talk:Affinity/@comment-2804:14D:5883:894B:F59F:104C:6040:1D31-20180720082841

"Be near an allied Tenno when they kill an enemy. When within 50 meters of an ally when they kill an enemy, you gain the same total Affinity, distributed as specified above."

Above? In "Kill an enemy with a weapon. Half of the Affinity goes to the Warframe and half to the killing weapon."

or

Unless specified otherwise, all Affinity gained uses the same split: 25% of the amount goes to your Warframe and 75% of the amount is divided evenly among all equipped weapons (25% each for three, 37.5% each for two, or the full 75% if only one is equipped).