Use the filters actually just as a lens protector, Just looking quickly wipe in the heat of battle with the sweater, the lens clean so is no longer a problem, because a maximum of cheap filter is scratched and not the expensive lens. Impairments such as turbidity, blackout, reflections, blurring, I could not identify with this product! Only bothered me the wobbly glass, as amended ... dust penetrates so relatively quickly before the main lens.