This is a Brand new CROMOFILTER - COKIN - 58mm Color Graduate Blue 1 (B1)(Color Graduate Blue Filter), half clear and the other half gradual Blue, one stop).This filter has a pin on the edge by the rim so the filter can be turned once it is on the lens. Thereby being able to level the color grad on the horizon line.In conditions of extreme light intensity, such as sunshine on snowy mountains or on the beach Color Grad Blue filters are recommended as essential. Color Grad Blue filters have several uses and offer the possibility to achieve otherwise unachievable results. Transform an average sunrise or sunset into something spectacular or convert a dull washed out sky to a breathtaking cool. No other filter has done as much to improve landscape photography as the graduated filter. Add color selectively while leaving the rest of the scene unaffected.Often you want to balance light intensity between two areas within a scene. This is important outdoors to allow more sky detail while properly exposing the foreground. Exposing for the foreground will produce a washed-out, over-exposed sky, exposing for the sky will leave the foreground dark, underexposed.Color Grad Blue filters are half clear, half blue, with a smoothly graded transition between. A Color Grad Blue-to-clear is often best for balancing sky to foreground and enhancing landscapes.Color-Grad® Filters B1 One StopTransform an average sunrise or sunset into something spectacular or convert a dull, washed-out sky to a breathtaking blue. No other filter has done as much to improve landscape photography as the graduated filter. Add color selectively while leaving the rest of the scene unaffectedHalf color, half clear with a graduated density transition for smooth blending into the sceneAvailable in a rainbow array of colors and Neutral Density filters Use in combination, with one affecting the upper half of the image, the other affecting the lower half.Ideal for snow or sand scenes or landscapes , or infrared digital photography when combined with an infrared filter.All warranty is through the manufacturer.