In conditions of extreme light intensity, such as sunshine on snowy mountains or on the beach, or when using a camcorder, ND (Neutral Density) filters are recommended as essential.
Neutral Density filters are often ignored by photographers, but they have several uses and offer the possibility to achieve otherwise unachievable results. ND filters appear grey and reduce the amount of light reaching the film, they have no affect on color balance.
They have four main uses:
1. To enable slow shutter speeds to be used, especially with fast films, to record movement in subjects such as waterfalls, clouds, cars, seas etc.
2. To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background.
3. To decrease the effective ISO of high speed film (ie:above ISO400) and allow it to be used outdoors in blight situations.
4. To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which would normally cause over-exposure.
Hoya are the largest world-wide producer of optical glass, in fact around 60% of the entire world-wide demand and supply is met by Hoya. It is important to select the best filters for your needs, as choosing inferior brands can deteriorate the performance of your high quality lenses. Hoya filters guarantee you the highest standards so you can create the best images.