Nikon Nikon 52mm Neutral Color Filter NC (52MMFILTERNC)
Since it has no effect on lens color balance (visible lights), this filter is optimal for use as a lens protector. Also, its multilayer coating prevents light reflection inside the glass, helping to e...
Pros: Protects the lens; no evident distortion or flare; well machined
Cons: Purists will argue against adding more surfaces to the lens.