For some people on here, this will be very basic info, but for others, i hope it will help you create vivid, better then life images! There are so many techniques on the camera itself that can be used to create different and interesting photos.
Exposure
Exposure is one of the things that will definitely effect the way the colors in the photograph come out.
Exposure is all about how much light is allowed to fall on the photographic medium, be that a photographic film or an image sensor, during the process of taking a photograph.
Correct expoure is determined by the sensitivity of the medium used. In photography, this sensitivity is measured on a scale published by the International Organization of Standardization (ISO). Exposure is a combination of the length of time and level of light received by the photosensitive medium. The camera lets me decide both of these by adjusting the shutter speed and the aperture. Slower shutter speeds (exposing the camera sensor for longer) and greater lens apertures (admitting more light) produce greater exposures.
If there is too much light let into the sensor, be that due to too large an aperture or too slow shutter speed, the photo will be over exposed, too bright and not contain any detail. These areas where information is lost due to extreme brightness are described as having ‘blown out highlights’ or ‘flared highlights.’ If there is not enough light, it will be underexposed, dark and washed out. These areas where the information is lost due to extreme darkness are called ‘crushed blacks.’
It is often possible to digitally correct an image that is incorrectly exposed, but if the image it too bright or too dark, and the detail is not in the photo, you can never recover it. It is also difficult to get good contrast in poorly exposed photos.
Then again, the photographer may be going for this exact effect. This is also when photography becomes subjective!
There are 3 main things on any digital SLR camera that will effect the exposure. These are the shutter speed, aperture and ISO. In my next blog, i'll explain these, and how they will effect and alter your images.
Until then, GOOD LUCK AND HAPPY SHOOTING!!
rebecca xx
