Photography tips for beginners to learn basic use of Ps compensate for chromatic aberration

What is the color

Sometimes, the photo subject outline appears the red or blue halo ( skew ) , this halo of color or color cast is called chromatic aberration . That part of the image is also like wearing stereoscopic glasses to see the effect, it seems to be the image produced shaking. There are two color difference occurs in the image and position of the edge of the chromatic aberration of magnification chromatic aberration . Either , all of the light wavelength of the three primary colors RGB differences exist (i.e. the color difference ) , when they pass through the lens caused by different refractive index . Magnification chromatic aberration occurs when the size of the image because different wavelengths will be different , and thus more close to the edges of the image , the color halo phenomenon is more serious which is also known as lateral chromatic aberration of magnification chromatic aberration , wide angle lens generally prone to this color.

On the other hand , the position is due to chromatic aberration caused by different wavelengths of the light image formed by the focus position shift deviation , also known as longitudinal chromatic aberration . Focal length of the lens , that is prone to such a telephoto lens color. Recently, however, in order to reduce the color shift many manufacturers have adopted the ED lens , compared with the previous color has largely been suppressed.

For position color tightening aperture and how to get some suppressed , but including chromatic aberration of magnification included , color itself is determined by its optical properties , in the design of the lens can not be completely eliminated. But, like Nikon and Pentax K -7 cameras are set up on the inside of the camera captured images chromatic aberration compensation. For other models the photographs , you can also take advantage of post-processing software or Photoshop and other image processing software to compensate for chromatic aberration .

Usually in high contrast color part of the more obvious . This is an instance of chromatic aberration of magnification . See the lower right portion of the building generates a large aberration. And with Photoshop compensation, it clears very clean. Here is an example of using Photoshop compensation , in fact, most of the image processing software is equipped with red / cyan and blue / yellow compensation.After all above,it's necessary to edit photos by photo retouching software.