Filter Tray is a technique of professional camera work.
Technical Details
Standard filter trays use adapter rings from 49mm to 112mm in diameter and accommodate filters with thicknesses of 2-3mm. The Cokin P-System (84mm wide) became established in the 1970s for smaller productions, while the A-System (67mm) was designed for the consumer market and the X-Pro System (130mm) for large format. Professional systems like LEE or Hitech use 100mm width with up to four filter slots stacked. The trays rotate 360° for aligning graduated filters and feature bellows mounts for stray light reduction.
History & Development
In 1973, Cokin revolutionized filter photography with the first modular resin insert filter system. Previously, filters were permanently attached to lens threads or improvised in front of the lens. In 1979, the professional LEE system from England followed, featuring optically higher quality polyester filters. Tiffen introduced waterproof seals in 1985, and NiSi developed magnetic quick-change systems for 67mm filters in 2010.
Practical Use in Film
In "Mad Max: Fury Road" (2015), DoP John Seale used LEE filter trays with orange 85C filters for the desert scenes. "Blade Runner 2049" (2017) combined Schneider True-Cut IR filters with ND graduated filters in the filter tray for exterior shots. The tray allows for quick filter changes without lens disassembly and precise positioning of graduated filters along the horizon. Vignetting with wide-angle lenses below 24mm and reflections between stacked filters are problematic.
Comparison & Alternatives
Round screw-in filters offer better sealing but require different diameters per lens. Matte box systems with 4x4" filters (138x138mm) dominate high-end productions due to superior stray light baffling and larger filter surfaces. Drop-in filters in telephoto lenses from 300mm focal length are changed internally within the camera. For extreme wide angles below 16mm, built-in ND filters on the camera are often the only vignette-free solution.