The Tiffen 77mm Graduated Blue Glass Filter can make a run-of-the-mill sunrise or sunset into a memorable image. This unique filter adds spectacular color to one half the photo while leaving the other half untouched.
If you like shooting landscapes in the morning or at dusk, make them into breathtaking studies. Not only will it add color but it does so with a subtle and extremely gradual transition between the two halves of the filter.
Soft/hard indicates the degree of transition. Horizontal/Vertical indicates the direction of the graduation.