Skip the Hoya HMC. The Hoya Pro1 is good, but not great. The Hoya HD s exceptional. It's tough, very easy to clean, and doesn't degrade IQ. Specifically, I recommend the Hoya HD Clear (don't need the UV). I use them on my 17-55 and 70-200L. BHPhoto.com has them. The 58mm is $35 and the 77mm is $55. $55 is a good price, it often hovers near $70 -- which is what I paid and, yes, worth the price.