Cokin P121L Graduated G2 Light Gray Neutral Density Filter - 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.
Note: This filter measures 84mm wide and fits the Cokin P series holder
The Cokin 121 Series of Filters
Cokin 121 - ND8 3-stop Graduated Neutral Density
Cokin 121F - 3-stop Graduated Neutral Density (Full)
Cokin 121L - 1-stop Graduated Neutral Density (Light)
Cokin 121M - ND4 2-stop Graduated Neutral Density (Medium)
Cokin 121S -3-stop Graduated Neutral Density (Soft)
Neutral Density Filters Have Four Main Uses
To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars
To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situation
To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure
In the Box
Cokin P121L Graduated G2 Light Gray Neutral Density Filter (1-Stop)