The optical properties of nano-scale zinc oxide/PMMA composites were investigated. Films were produced by spin coating and cast coating dispersions of nanoparticle/PMMA organic solutions. This allows for the preparation of nanocomposite films with controlled thickness containing up to 22 vol. % homogeneously dispersed nanofillers. It was found that the refractive index of the composite films scaled linearly with volume fraction of nanofillers. The films were transparent in the visible light range and strongly absorbing in the UV range. When the films were loaded with a high content of such semiconductor nanoparticles, the surface resistivity decreased enough for the coatings to be used for antistatic applications.