Introduction to the types, functions and purchasing skills of SLR camera filters.

Photography is an amateur activity that many people like. In fact, the definition of photography and photographing is different. Photography is often realistic, and photography is artistic, so more often, photographers require photos to have perfect effects. Simply relying on simple cameras and personal skills often fails to achieve perfect artistic requirements. At this time, various filters are needed to save the scene. The following small series will introduce you to the types and functions of SLR camera filters.

Introduction of Types and Functions of SLR Camera Filters

Ultraviolet color filter

Uv filter, also called UltravioletFilter, can weaken the blue tone caused by ultraviolet rays, prevent UVa and UVb from entering the lens to affect the imaging, help improve the image clarity and color effect, and protect the lens surface from damage.

When choosing a good UV filter, the first thing to look at is the transmittance. The higher the transmittance, the higher the quality of the filter. Secondly, try to choose ultra-thin borders to avoid dark corners and affect imaging; Finally, try to choose multi-layer coated UV, because UV mirrors with no coating or poor coating are prone to glare when shooting in backlight, which will affect the imaging quality.

Circular polarizer

CPL filter, also called circular polarization, mainly filters polarized light reflected from nonmetallic surfaces. When the CPL mirror rotates, it can make the sky bluer, the leaves greener and the clouds whiter, increase the color saturation, and also reduce the soft focus caused by the large aerosol in the landscape photos, but it does not change the color balance of the whole picture.

When choosing a good CPL filter, it should be noted that there is no color shift after the lens is installed, and it can be clearly focused at the wide-angle end and the telephoto end. Try to choose multi-layer coating, and at the same time, the frame is ultra-thin to avoid dark corners and affect the shooting effect.

Gradient mirror

GradualchangeFilter generally has three colors: gradient grey mirror (GC-GRAY), gradient blue mirror (GC-BLUE) and gradient orange mirror (GC-ORANGE). The function of the gradient mirror is only on one side, and it has no effect on the photo on the other. The gradient grey mirror balances the exposure difference between the sky and the earth, the gradient blue mirror can turn the gray sky into blue, and the gradient orange mirror can make the sunset monochrome effect better.

When choosing a good gradient lens, it should be noted that there is no dark corner at the wide-angle end after the lens is installed, and the imaging is impartial.

Reducing mirror

NeutralDensityFilter is also called medium gray density mirror. The main purpose of using neodymium mirror is to prevent overexposure. If the light is too bright, it is difficult to choose a slower shutter speed. At this time, the ND mirror is used to reduce the light entering the lens, and a slower shutter can be used for shooting, which is suitable for shooting flowing water and night scenes.

When buying a subtracter, you should learn to calculate the exposure time after adding a neodymium mirror. Assume that the shutter speed of normal exposure without adding Nd mirror is t, and the exposure gate speed =T*x under the same setting, and this x is the number marked on Nd mirror. For example, the original exposure time is1125 seconds, and after adding the ND400 subtractor, the exposure time becomes 3.

The above small series introduces several filters of SLR cameras, what their characteristics are, and how to choose good quality filters. There are many kinds of filters for SLR cameras. In the above, Bian Xiao just introduced four kinds of filters used in life. There are many classifications of these four kinds of filters, so you should do more homework before buying filters to avoid being confused.