Reflection Week 9 (Edu. Tech)

Hi guys! 😀

Today’s class was conducted by our beloved Dr Fariza. Yay! Today was about photography. Photography is the process or art of producing images of objects on sensitized surfaces by the chemical action of light or of other forms of radiant energy, as x-rays, gamma rays, or cosmic rays. To make it simple, photography is the art or practice of taking and processing photographs. Dr Fariza explained to us what is meant by aperture, light exposure, and depth of field.

An aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. The aperture determines how collimatedthe admitted rays are, which is of great importance for the appearance at the image plane. If an aperture is narrow, then highly collimated rays are admitted, resulting in a sharp focus at the image plane. A wide aperture admits uncollimated rays, resulting in a sharp focus only for rays coming from a certain distance. This means that a wide aperture results in an image that is sharp for things at the correct distance. The aperture also determines how many of the incoming rays are actually admitted and thus how much light reaches the image plane (the narrower the aperture, the darker the image for a given exposure time). In the human eye, the pupil is the aperture.

Light Exposure:

Exposure is the amount of light per unit area (the image plane illuminance times theexposure time) reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminance.

Depth of Field:
In optics, particularly as it relates to film and photography,depth of field (DOF), also called focus range or effective focus range, is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.

So these components are vital in the photography industries in producing and capturing awesome masterpiece. In conjunction, Dr Fariza also asked us to create a Flickr account. So here is my account. Do follow! 😀



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