IRND filter graduated in reverse Nano hard edge 100 x 150 mm NiSi 0.9 to 0.15 (3 to 0.5-Stop)

This NiSi Nano Hard-Edge 0.9 to 0.15 reverse graduated IRND filter is compatible with filter holders that can accommodate 100 mm x 150 mm rectangular filters that are 2 mm thick. It can be applied to darken bright skies, specifically during a sunrise or sunset, while allowing normal and unaffected exposure in the other regions of the image.
This filter achieves its effect with a density band of 0.9 in its central region that provides a 3-step reduction in the light entering a lens. This band extends approximately 4 mm in both vertical directions, which narrows to a density of 0.15 that provides a 0.5-stop reduction in light at the upper edge. Directly below the 0.9 density band, it narrows to clear, with a hard edge transition line before the cleared area.
Placing a density band of 0.9 that narrows to a density of 0.15 above it with a clear area directly below, allows the Nano NiSi reverse graduated IRND filter of 100 x 150 mm 0.9 to 0.15 to match the position of the sun when it is at, or immediately above the horizon. In such cases, the sun may appear closer to the center of an image instead of the upper edge, and an increase in brightness is created that is more prominent on both sides of the sun than above it. This brightness pattern corresponds to the density pattern in the NiSi 100 x 150 mm Nano Hard-Edge Reverse-Graduated IRND 0.9 to 0.15 filter. The hard edge transition line in this reverse graded neutral density filter is useful for difficult transitions between heaven and earth, while 3 stops at 0.
Compatible with filter holders that can accommodate rectangular filters 2 x 100 mm thick
It effectively darkens bright skies, specifically during sunrise or sunset, while allowing normal and unaffected exposure in the other regions of the image.
The 3-point density band that is reduced to a density of 0.5 points at the upper edge while directly over a cleared area creates a neutral density pattern that matches the position of the sun when it is on the horizon or immediately by over the horizon.
The 3-stop density band extends approximately 4 mm in both vertical directions
The density pattern corresponds to the sun's brightness pattern when it appears or is closer to the horizon instead of a higher angle, which creates an increase in brightness that is more prominent on both sides of the sun than on it
The hard edge transition line between the 3-step density band and the cleared area below is useful for difficult transitions between the sky and the earth.
The gradation of 3 to 0.5 steps is applicable to multiple regions of brightness within the sky
The filter does not affect the overall color of the image.
Each surface includes a NiSi Optical Nano Coating layer that attenuates infrared light, as well as visible wavelengths, to maintain color neutrality and suppress color tones due to longer exposure times
The nano coating provides an improved flange effect with water or oil for more efficient cleaning
Constructed of optical glass for clarity.

20 EUROS DISCOUNT FOR CANARY ISLANDS

• Filter factor from 8x to 1.4x, 3 to 0.5-Stop
• Reduce exposure for sunrises or sunsets
• Increase to maximum density in the center
• Effect set for Sun on Horizon
• Perfect for balancing exposure when the light is harder on the horizon and is reduced to the sky.
• Optical glass for high definition
• Nano waterproof and low reflection coating
• Compatible with the 100 mm NiSi system