Neutral Density Filters

In photography, neutral density filters helps reduce the amount of light entering a camera lens. Use of a neutral density filters give the photographer more control with shutter speeds to create the right effect in any circumstance. Neutral density filters aid in light balance, broadband spectral sources, and beam splitters. These are also referred to as gray filters, or ND filters.

Neutral density filters come in shades of gray with no effect on color or contrast balance, just light or darkness. The darker the shade, the darker the effect and vice versa. These are extremely useful when the photographer wishes to reduce the shutter speed, but prefers not to drown the intended image in light. Great for indoors as well as outdoor use against over exposure.

As one type of a neutral density filter, metallic filters deposit a special metal coating over optical grade glass, or similar substrates. The importance of both the metal alloy and substrate depending on desired wavelength region and effects. Metallic neutral density filters show some sensitivity to angles.

Generally there are two types of neutral density filters. Reflective neutral density filters use reflection to reduce the amount of light photographed. Absorptive neutral density filters partially absorb the light. Both diminish background images. Backgrounds blur while the photo subject clears into focus.

Graduated neutral density filters do exactly what others do, enable the photographer to snap a better photo by cutting down on light. The difference between a regular neutral density filter and a graduated neutral density filter comes down to the second including the ability to move through soft to hard edged graduations.

When photographing the sun or other intense light sources, purchase higher valued neutral density filters manufactured specifically for such use. Follow safety instructions closely, especially when photographing welding, smelting or anywhere near extreme heat.

Obtain great landscape shots through a 10mm graduated density filter, or go higher for spectacular results. A graduated neutral density filter gives added beauty to high speed applications, or long exposure motions such as those needed in photographing sports.

New photographers on a budget might prefer to start small. Photography magazines include ads and addresses to write to from camera manufacturers. Search online for the lowest price neutral density filters through Google, Yahoo, or other search engines. Also look in electronic store ads, online and brick-and-mortar auctions, and the local classifieds for great deals on neutral density filters.