Rob 5 I've only used it a few times since I've got it but I've been happy with the results it provides. Being an ND1000 filter means that it reduces the number of stops enough to allow for decent long exposures. I've found the colours good and the brightess is dependant on the length of your exposure. I haven't seen any degradation in the quality of the images I've taken. Overall I find the k&f filter great value for 2.