This filter allows you a blue sky even speak, the blue gradient filter Stealth Gear can be greater or lesser degree even more attention to the sky in the photo. The advantage of these longer filters is that you move up or down to move the transition from the gray filter because usually your horizon is not in the middle.
Blue gradient filter
High Quality Organic Glass filter (CR 39)
100 x 130 mm vertical alignment
Wrapped in a soft case for maximum protection
Compatible with the Stealth Gear P filter system to use the Cokin filter
Compatible with all other 100mm width filter