Lens hood is one of the most important accessories for each lens you own. A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles. JJC LN-N101 Lens hood is specific for NIKON 1 LENS. JJC LN-N101 replaces NIKON HN-N101. The LN-N101 provides the 34mm diameter thread for original NIKON HC-N101 or JJC LC-N101 lens hood cap or any other 34mm diameter filters.