Often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don’t have total light control, as in bright contrasty landscapes. Exposing for the foreground will produce a washed-out, over-exposed sky while exposing for the sky will leave the foreground dark and under-exposed. Cokin graduated gray ND filters are part clear, part neutral density. They allow the transition to be blended into the scene, often imperceptibly. A ND.6-to-clear, with a two stop differential, will generally compensate the average bright sky-to-foreground situation and is also the most popular density of the series.
This filter measures 130 x 170mm and only fits the Cokin X-PRO series holder.
The Cokin 121 series of filters comes in five variations of graduation:
- Cokin 121 – 2 stop Graduated Neutral Density
- Cokin 121S – 3 stop Graduated Neutral Density (Soft)
- Cokin 121F – 3 stop Graduated Neutral Density (Full)
- Cokin 121L – 1.75 stop Graduated Neutral Density (Light)
- Cokin 121M – 1.75 stop Graduated Neutral Density (Medium)
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