Cokin gradient Grey P121L

Cokin P121L Graduate G2 Light Gray Neutral Density Filter - Often necessary or convenient to balance the intensity of light in one part of a scene with another. This is especially true in situations where you don't have full control of the light, such as in bright contrasting landscapes. Exposure for the foreground will produce a faded, overexposed sky, while exposure for the sky will leave the foreground dark and underexposed.

COKIN graduated gray ND filters are part clear, density neutral part. They allow the transition to be mixed into the scene, often imperceptibly. A ND.6 of course, with a two-stop differential, usually compensate for the situation