Cannon 550D Training

After the last time failing to try to achieve perfect lighting in a dark space we were not prepared to repeat the situation again and this time I took a Cannon 550D home and I watched a 3-part training video on photography. What I found the most useful was the part about exposure and how to achieve it with the combination of aperture, shutter speed and ISO speed which are massive improvement when you don't have artificial light to help you. Now I know that aperture is the adjustment of the lens opening, measure as f-number, which controls the amount of light passing through the lens. Aperture also has an effect on depth of field and diffraction - the higher the f-number, the smaller the opening, the less light, the greater the depth of field and the more diffraction blur. Shutter speed adjusts the speed of the shutter to control the amount of time during which the imaging medium is exposed to light and it is often expressed as fractions of seconds. Shutter speed of shorter duration decreased the both the amount of light and the amount of image blurring from motion of the subject and/or camera. ISO speeds are employed on modern digital camera as an indication of the system's gain from light to numerical output and to control the automatic exposure system. The higher the ISO number the greater the film sensitivity to light, whereas with a lower ISO number, the film is less sensitive to light.  A correct combination of aperture, shutter speed and ISO speed leads to an image that is neither too dark nor too light, hence it is 'correctly exposed'.

Here's a link for you to learn more about this fantastic camera:

Canon 550D Training Video - Beginner guide to photography part 1/3

Cannon 550D Training Video - Beginner guide to photography part 2/3

Cannon 550D Training Video - Beginner guide to photography part 3/3