Robust and clear

With photographs outdoors on color film or slide the gray generated by UV rays is usually more disruptive than helpful. This service also meet simpler and cheaper filter, but in direct comparison of the B & W filter performs particularly well because he really only filters out the UV range - everything else is in pure UV filters also not desirable. He is well-reflective, translucent and by MRC remuneration also quite resilient.
Therefore: 5 star.