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Irix Edge Hard Graduated ND8 filter with optical density 0.9 provides a 3 stop reduction of light hitting the sensor of the camera which is irreplaceable every time when photographing a landscape with a hard line of the horizon like sea or savanna, allowing to achieve spectacular effects without the use of the HDR technique.
Irix Edge Hard Graduated ND4 filter with optical density 0.6 provides a 2 stop reduction of light hitting the sensor of the camera which is irreplaceable every time when photographing a landscape with a hard line of the horizon like sea or savanna, allowing to achieve spectacular effects without the use of the HDR technique.