every photograhic emulsion is very sensitive to UV rays because the energy of light is dependent on the wavelength. The shorter the wavelength the more sensitive. Very short wavelength Gamma rays or X-rays are most dangerous for silver emulsions (and for us too). If you want to eleiminate the blueish haze in the far landscape or in pictures from mountains into the valley, you should try a polarizing filter. This haze comes from light scattered on tiny droplets of water and dust particles in the atmosphere and is partially polarized, the filter can block this. The colour saturation gets much better. I think for your MX you need only a linear polarizing filter, they are quite cheap to get on the used market.