IMAGE QUALITY IN DSLR CAMERAS

There are a number of factors that will have an effect on image quality in DSLR cameras. Some factors can be controlled by the photographer, including exposure, ISO and lens selection. Others are specific to the camera being used, such as sensor size and processors.

ISO & Noise

• ISO is the camera's sensitivity to light. In bright settings a low ISO number (100-200) is typically used. In low light the camera requires a longer shutter speed, or increased aperture size, allowing more light to hit the sensor. However, some pictures may require a fast shutter speed photos of indoor sports, for example. In those cases the photographer can increase the camera's ISO setting to compensate for the low light. A higher ISO results in the creation of digital noise, those blue, pink and purple specks that appear in pictures generally viewed as an undesirable by-product.

Lens Quality

• Whether you are using a film camera or digital camera, the lens you select will affect image quality as well. Long before light from your picture appears on the digital sensor, it has to travel through a number of glass or plastic elements inside the lens. Using cheaper lenses can result in a permanent effect on the quality of your photos. Cheaper lenses may result in poor autofocus or have chromatic aberrations a purple fringing in your photos. They may also have difficulty with maintaining perspective on walls.

Exposure

• Exposure is another factor that will affect the image quality in DSLR cameras. Exposure is the amount of light that travels through the lens to the digital sensor. The amount of light is controlled in two ways, shutter speed and aperture. The shutter speed determines how long the shutter stays open, allowing light to hit the sensor. The lens aperture is the size of the opening that light travels through, from small to large. If you have a slow shutter speed then you need a larger opening, and vice versa. While many cameras have sophisticated auto-exposure programs, under certain conditions those programs will not always provide the correct setting. If an image is under- or over-exposed too much, the picture will not be usable.

  
  

  
  

  This is Output from DSLR Cameras

  
  

  
  

  
  

  

  
  

  Image Focus on subject 

  
  

  

  
  

  
  

Sharpen Of the Image ~