Light rays which are reflected by any surface become polarised and polarising filters are used to select which light rays enter your camera lens. PL (Linear Polarising) and PL-CIR (Circular Polarising) filters have the same effect, but it is important that you choose the correct version for your camera. They allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colors to become more saturated and appear clearer, with better contrast. This effect is often used to increase the contrast and saturation in blue skies and white clouds. HOYA's polarising filters do not affect the overall color balance of a shot. How to select the correct Polarising filter: Many of today's cameras use semi-silvered mirrors or prisms to split the light entering the viewfinder in order to calculate exposure and focusing distance. PL (Linear Polarising) filters can sometimes interact with these items to give unpredictable exposure or focusing. So we recommend that you choose a PL-CIR filter unless you have a manual focus camera which has no beam splitter.
Rated 3 out of
Hoya packaging quality is very bad"Hoya used to be the brand I like, but I am quite disappointed by this CIR-PL filter. The ""new"" filter came with dust particles and I needed to use a blower to clean it. Still there were 3 particles that I needed to use cleaning paper to remove. After carefully brushing off those particles, I saw lighter color patches on the spots where my paper touched. If not for the low sales price, I would have returned the filter to Henry's. Finally I resorted to using lens cleaning fluid to clean the filter to my satisfaction.
Moreover, the box containing the filter does not have enough padding, and with the filter moving in the closed container it will potentially scrape off the cheap padding underneath which will turn into dust on the filter. I have added an extra layer of padding myself to prevent the filter from moving. Why do I had to do so much for a ""new"" filter? I guess I got what I paid for, and I only hope the filter quality is at least decent. From now on, I probably will stick with Cokin filters (Cokin container is so much better)."