Irix Edge Reverse Gradual ND is a special purpose filter which helps photographer every time when shooting sunrise or sunset. High contrast scene when the sun is right above of the horizon needs to reduce the amount of light reaches the sensor of the camera to counteract overexposed part of a scene.
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.
The Irix Edge Square Filter Protector Set protects against accidental impacts, thus protecting the filter from damage.