Step into the realm of creative control with the NiSi Nano Hard-Edge Reverse-Graduated IRND 0.9 to 0.15 Filter. This exceptional filter aligns perfectly with filter holders designed for 150 x 170mm rectangular filters, boasting a sleek 2mm thickness. Capturing the magic of sunrises and sunsets is now within your grasp, as this filter elegantly darkens those vibrant skies while maintaining an unaltered exposure in the rest of the frame.

Delve into its ingenious design: a 0.9 density swath takes center stage, orchestrating a symphony of light reduction, a total of 3 stops in strength. Expanding about 4mm in both vertical directions, it seamlessly transforms into a 0.15 density for a subtle 0.5-stop reduction along the upper edge. Just below the 0.9 density, a seamless transition into transparency is achieved, all edged by the distinctive hard line.

This filter's ingenuity lies in its ability to mirror the sun's position when it's at the horizon or just above it. When the sun lingers at this juncture, its luminosity can spread closer to the image center than the upper edge, imparting enhanced radiance to both sides. The NiSi 150 x 170mm Nano Reverse-Graduated IRND 0.9 to 0.15 Filter ingeniously embraces this phenomenon, strategically aligning its gradient to mirror this celestial dance.

A potent tool for scenes where the sky meets the land with conviction, its meticulous design delivers a 3-stop to 0.5-stop gradation, accommodating a spectrum of brightness levels across the sky. Seize the enchantment of fleeting moments, masterfully guiding the viewer's gaze with this filter's captivating storytelling prowess. Your photographic journey takes an artistic leap with the elegance of the NiSi Nano Hard-Edge Reverse-Graduated IRND 0.9 to 0.15 Filter.

• Compatible with filter holders that can accommodate 2mm-thick, 150 x 170mm rectangular filters
• Effectively darkens bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image
• 3-stop band of density that tapers to a 0.5-stop density at the edge above it while directly above a clear area creates a neutral density pattern that matches the positioning of the sun when it is at, or immediately above the horizon
• 3-stop band of density extends approximately 4mm in both vertical directions
• Density pattern corresponds to the brightness pattern of the sun when it appears at or is closer to the horizon as opposed to a higher angle, which creates an increase in brightness that is more prominent on both sides of the sun than above it
• Hard-edged line of transition between the 3-stop band of density and the clear area below it is useful for hard transitions between the sky and land
• 3-stop to 0.5-stop gradation is applicable to multiple regions of brightness within the sky
• Filter does not affect the overall coloration of the image
• Each surface includes one layer of NiSi Optical Nano Coating that attenuates infrared light as well as visible wavelengths, to maintain color neutrality and suppress color casts due to increased exposure times
• Nano coating provides an improved beading effect with water or oil for more efficient cleaning
• Constructed from optical glass for clarity
• Leatherette pouch included for storage and transport