The Tiffen 4x4" Dark Red #29 Filter is ideal for strong contrast enhancement as it completely absorbs green and blue whilst enhancing red. In addition to contrast control, red filters enhance skin tones, tonal corrections and are effective for more dramatic landscapes.nnWhat a wonderful filter! Transform a sky with white, fluffy clouds into a threatening storm! Want your green apples to be even greener? Get out this red filter! Add a polariser and the aforementioned sky becomes even more threatening.nnA standard red filter is a #25. The #29 is stronger and will accentuate the effects mentioned above.nnnFeatures:nn- Stronger than a red #25n- Clouds are considerably enhanced, almost to the mood of a storm; Darkens blue sky creating dramatic contrast between sky and cloudsn- Use it with a polariser for dramatic black and white effectsn- It is most effective in reducing haze, and moonlight effects are easily achieved; Creates greater contrast between foliage and flowersn- Used in scientific photographynn- Excellent copy filter for blueprintsnnnnSpecifications:nn- Type: Redn- Size: 4x4" (100x 100x 4 mm)n- Grade: 29n- Filter Factor: 8 (+3 stops)n- Effect: More dramatic visual effect than a #25; Completely absorbs green and blue and enhances redn- Application: Creating very dramatic sky effects, accentuating cloud contrast for landscapes; Simulating a moonlit scene in broad daylight with slight underexposure; Rendering foliage white and cutting through fog and hazen- Construction: Glass