UV(o) or UV(n)

[5teve]

Hi there

I am looking to get a 55mm Hoya UV lens mainly to protect my Kyocera M410 lens in gritty conditions, i have had a few close calls with grit on the lens!

I notice there are UV(o) and UV(n) lenses available. i am looking at a Hoya SUPER HMC Multi Coated UV Filter 55mm which is UV(o)

what are the differences? and will a UV(o) work ok on my camera?

Thanks in advance

Steve