Apr 09, 2018 Written by Ashishrai Filter
1.Lens filters are transparent or translucent glass or gelatin elements that attach to the front of a lens. They protect the camera lens, alter the characteristics of light passing through the lens or add special effects and colors to an image.
2.Screw-in filters fit directly onto your lens, in the threads at the edge of the lens barrel. Each screw-in filter is a specific width, so the more lenses (of different widths) you have the more filters you’ll need.
3.For slot-in filters, a filter holder is placed on the lens’ adapter ring and filters are dropped into the holder. The holder usually has interchangeable rings so the holder can fit on a wide array of lenses.
4.Filters change the dynamics of the light entering the lens and usually require you to alter your exposure to compensate for this fact. This is called the Filter Factor and each filter has a specific filter factor, so read up on the
5.Ultra Violet filters are transparent filters that block ultra-violet light, in order to reduce the haziness that is noticeably apparent in some daylight photography. UV filters don’t affect the majority of visible light, so they are a perfect form of lens protection and they will not alter your exposure.
6.A Polarizing filter can be used to darken overly light skies as it increases the contrast between clouds and the sky. Like the UV filter, the Polarizer reduces atmospheric haze, but also reduces reflected sunlight. The most typical function of a Polarizer is to remove reflections from water and glass.
7 As you know, visible light is made up of a multiple color spectrum. But in photography, you have to make a choice to capture images with the camera’s white balance set to record whitish blue light of daylight or set to record the reddish-orange tungsten (incandescent) light… with a few variations (i.e. sodium-vapor or fluorescent).
8.Attaching a neutral density (ND) filter to your lens uniformly reduces the amount of light entering the lens. The ND filter is helpful when the contrast between the highlights and shadows is too great to get a quality exposure.
9.Soft focus filters, do exactly that, they reduce the sharpness of an image, but only to an extent that is barely noticeable. They are useful in shooting close up shots of people’s faces.
10.There are specific filters for B&W photography that lighten similar colors and darken opposite colors, thereby enhancing the monochromatic look. There are Red, Orange, Yellow, Green and Blue filters for use in B&W photography.