The “F-DL” (Fluorescent to Daylight) filter is designed to correct color cast when shooting under fluorescent lighting.

Fluorescent lights often give photos a greenish or bluish tint—this filter compensates for that and restores more natural colors.

It was primarily used with film cameras, especially before digital white balance became standard.

It screws onto lenses with a 58mm filter thread.

This item is vintage and in excellent condition