Abstract: A filter for cigarette smoke is formed by a generally tubular member (10) having a primary barrier wall (24) extending across the midregion of its interior. Smoke is accelerated from the upstream chamber to the downstream chamber (50) in the filter through a small accelerating opening (26) in the midregion of that barrier. A downstream target, or barrier (28), whose surface area is no greater than the cross-sectional area of the accelerating opening is placed downstream from the opening at a distance which is preferably no greater than the diameter of the accelerating opening. Collection vanes (52-56) at the upstream end of the downstream chamber (50) are formed downstream from the barrier (24) combine with the action of the target (28) to separate liquids and semi-solids from the smoke, and to collect them, at the upstream end of the downstream chamber (50).