Neewer 10 in 1 Square Filters Kit Compatible with Cokin P Series - Includes: Gradual Blue Grey Orange Tobacco Pink Red Green Yellow ND8 ND4 Filters + Filter Bag Digital Professional photographers and keen amateurs highly value the RAW capture as they well know that any software manipulation would result in a loss of quality of their images. The same reckon that many of the COKIN effects can't be produced on computer whatever the performance of the software. This is particularly true with all effects related to light management (light polarization, light balance, brightness control, etc) where the quality of the image is fully related to light expertise at time shooting. This is why most of them now combine the use of this filters with post-production work. Filters not only offer an indispensable support but also allow a considerable amount of time saving in post production software job.