Many lens filters in a digital society is now redundant. Most of the camera and / or processing tools are now also features post to correct the white balance, for softening or for various special effects. But there are some features that simply do not reproduce without the use of filters. Here we give an overview of the key, which must filter every photographer, to learn and use.

Lens with Filter

Small filters can be placed outside of the lens and gives the effect of strengthening or fun. Filters have their hay day, when people where still pictures with film. Digital Imaging at the time not so very far, and we use different filters to obtain the desired effect instead. 

For this reason, many associate the use of the filter with a clear image manipulation. But the most common filters do not provide the results of such drastic. They are only used to enhance the individual effects, such as the phenomena of light.

Here are a few frequent Lens Filter:

UV filter

UV filter to improve color reproduction, and prevents blurring caused by ultraviolet radiation. Ultraviolet light is invisible to the eye and is very common when taking pictures under a cloudy sky, mountains, coastal areas and areas with very clear air. UV filters that are not colored and does not require an extension of the duration of exposure. It is recommended that UV filter permanently on the lens as a protective filter is mounted

When you install these filters on the lens, is the actual filter dust and scratches forever. It is much cheaper to replace the filter if you scratch or damage, rather than replacing the entire lens.

With the use of UV filters, it is important to remember that the glass-filter must be at least as good quality as the lens. If not, then deteriorates the image quality.

Polarizer

A polarizing filter is probably the best known and used by all filters, and not without reason. Filter works much like when a pair of sunglasses in front of the lens. Elimination of reflection, glass, gloss and surface water, so you pictures of what to take from behind a window or under water, not a complete reflection surface. Polarizing filter also contribute to more contrast and more saturated colors, and this can obscure the sky, which is especially useful when shooting landscapes. Polarizing filters work, but only if you are photographing the subject from the point, not exactly. This means that you are right in front of the window and fired, the filter can not eliminate the reflection in the glass. Please make sure that you always from the corner to shoot.

ND (Neutral Density) filter

Gray filter or a neutral density filter, to images with long exposure times or large holes, in very sunny situations. This is because the amount of light emitted by the lens increases. This is useful when, for example, to photograph waterfalls still want in the afternoon, but want to smooth the effects of moving water. They are available in different strengths, depending on how much light is blocked.

Another possibility is the conclusion of ND filter. These filters go from dark to light, with smooth or good sharp transition. This filter is used, for example, if the foreground and background of the different exposures. An example is when you’re shooting a little dark under a clear sky. With a graduated ND filter, you will be able to properly implement the darker parts of images without exposing the bright parts are overexposed.

They are also used to reduce the image contrast. At sunrise to, you need the sun a bit to show the details in other areas of the image, dim. There were also, with alternating colors, which can be used for special effects evaluated. Orange or brown version of heaven can offer the atmosphere in the picture.