A Soft Grad has a wide, gradual transition between the dark and clear areas, making it ideal for uneven horizons. A Hard Grad has a sharp transition for flat, unobstructed horizons like the ocean.
No, Tiffen's ColorCore process and Water White glass are engineered to maintain high color neutrality, preventing the unwanted tints often found in lower-quality filters.
An ND 0.9 filter reduces light by exactly 3 stops at its densest point, allowing for more controlled exposure in bright environments.