Cokin P725 Square Yellow CC30Y Color Correction Filter

The Cokin P725 is a CC30Y color correction filter — a 0.30-density yellow filter in Cokin's 84mm x 84mm square format, designed for use with the P (M) Series holder system. Color correction filters at this density class are precision instruments: the CC30Y shifts color balance toward yellow by a controlled, measurable amount that corresponds directly to the output of a color temperature meter. In film photography — particularly with transparency (slide) film where post-production correction isn't available — matching the filter's density to a meter reading is how color-critical photographers ensure the scene is rendered with neutral, accurate color balance rather than an uncorrected cast introduced by mixed or off-color light sources. The 84mm square format, made in France from Cokin's optical resin, integrates cleanly into an existing P Series filter stack without requiring additional hardware.

The practical audience for the P725 is narrower than for most photographic filters: it's most valuable to medium and large format film photographers, color scientists, and technical photographers who use color meters as part of their capture workflow, and to video shooters working in JPEG or log formats where in-camera color accuracy is important at the point of capture. For digital photographers shooting raw, the identical correction is more practically applied in post, and the filter offers little workflow advantage. Where it earns its place is in the stack of a working film photographer who treats color correction as a pre-capture technical step — the same way a seasoned cinematographer used to work before digital color grading became universal. At its weight of 4 grams, the P725 adds nothing to carry and everything to color accuracy when the situation calls for it.