Bausch & Lomb Criterion - "Color Planetary Drop in Filter Set" of (5) Photo / Visual with Case

This vintage Bausch & Lomb Criterion “Color Planetary” Drop-In Filter Set includes five precision optical filters designed to enhance planetary detail for both visual observation and photography. Each filter offers targeted contrast improvements—revealing subtle atmospheric bands, cloud structures, and surface features on planets like Jupiter, Saturn, Mars, and Venus. The drop-in format ensures quick, secure changes at the eyepiece, and all filters are clean and in excellent working condition. Included is the original protective case, keeping the full set organized and ready for the field. A quality collectible and a practical tool for any classic telescope setup.