52mm 6Pc Color Filter Kit is an excellent filter kit for NIKON D40 D50 D60 D3000 D5000. Camera filter is a wonderful & very important camera accessory. Each camera filter has its own functionality & features. The one of the most important feature of camera filters is to add special effects to our photographs. Camera filters are also used to protect our camera lens. Camera filters comes in many different shapes such as rectangular filters, threaded round filters, bayonet round filters & square filters etc.