Dear Moderators and Sifus,
May I know is it necessary to use branded UV filter ? I have two UV filters- Hoya UV and Sakure UV. I put them on my Nikon 18-200mm VR lens and Sigma 18-50mm f/2.8 EX DC Hsm Macro lens. Some photographers told me UV filters are mainly to protect our lens from scratching, reduce hazing effect and dusty. They used ordinary UV filters. Whereas another group of photographers emphasized on the quality of UV and BW filters to obtain good effect on their photos. Could you please tell me which is true? I hope to learn from you all so that I could teach my students in the school. I thank you.