UV filter
A UV filter is a piece of glass or plastic used to remove UV rays from light before it enters a camera lens, and also to protect the lens from dirt and moisture. In digital photography, the UV filtering function is unimportant as the sensor is unaffected. In film photography, strong UV light in outdoor sun can cause a bluish cast to film. The protection function is the main reason why many photographers use UV filters.
Some are treated with coatings to reduce glare or reflections. Coatings can be single or multi-layer. Uncoated lenses are generally easier to clean because you don't have to worry about damaging the coating.
Brands
[edit | edit source]B+W
[edit | edit source]- B+W UV filter- ground glass, brass mounting ring, multicoated, made in Germany
Canon
[edit | edit source]Heliopan
[edit | edit source]Hoya
[edit | edit source]- Hoya HD UV filter - four times stronger than traditional glass, multicoated, made in Japan
- Hoya Alpha UV filter - made in the Philippines
Nikon
[edit | edit source]Tiffen
[edit | edit source]- Tiffen UV filter - uncoated, made in USA