assignment no.- 4

Apr 15, 2018 Written by Lubna Tafzeel Aperture


                                                IMPORTANCE OF APERTURE

  1. Aperture is a hole within a lens, through which light travels into the camera body.When you hit the shutter release button a hole opens up that allows your camera’s image sensor to catch a glimpse of the scene you’re wanting to capture.
  2. Aperture is measured in f-stops, which is a ratio of the focal length divided by the opening size. So the smaller the f-stop the wider the opening and therefore more light can reach the sensor, resulting in better low light pictures and less noise. 
  3. The aperture that you set impacts the size of that hole. The larger the hole the more light that gets in – the smaller the hole the less light. Aperture is measured in ‘f-stops’.
  4. Moving from one f-stop to the next doubles or halves the size of the amount of opening in your lens.
  5. It has a big impact upon depth of field. Large aperture will decrease depth of field while small aperture will give you larger depth of field.
  6. It can add dimension to your photographs by blurring the background, and it also alters the exposure of your images by making them brighter or darker.
  7. Effects of Aperture: Exposure

          One of the most important effect is the brightness, or exposure, of your images. As aperture                  changes in size, it alters the overall amount of light that reaches your camera sensor – and                    therefore the brightness of your image. A large aperture the brighter a photograph. A small                    aperture does just the opposite, making a photo darker.

       8. Effects of Aperture: Depth of Field

          Depth of field is the amount of your photograph that appears sharp from front to back. Some                  images have a “thin” or “shallow” depth of field some have a “large” depth of field, where both                the foreground and background are sharp e.g., f/2.8 will result in a large amount of background              blur while apertures like f/8, f/11, or f/16 will have sharp details in both the foreground and                      background

       9. Aperture is measured in the f-stop scale. The number denotes how wide the aperture is.The                  scale is as follows: f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22.The most important thing to                      know about these numbers is that, from each number to the next, the aperture decreases to                  half its size, allowing 50% less light through the lens.

     10. f/1.4: This is great for shooting in low light, but be careful of the shallow Depth of field. Best                   used on shallow subjects or for a soft focus effect. f/22: Best for landscapes where noticeable               detail in the foreground is required.