technical: Lenses 3 (filters)
 

Filters

Filters are lens accessories made of gels that screw onto the end of the lens. They can be used just to protect the lens from fingerprints, or to create various special effects. Here are just a few examples;

screw on filters: skylight (reduces glare from the sun), starburst (makes lights and other bright areas into stars) linear polarizer (reduces reflected light) radial polarizer (can be rotated to select which reflections are reduced), coloured (changes the colour of the picture, or the contrast in black and white), gobo (solid black wiith a shape cut out of to make photos in the shape of a heart, circle, etc).