Wednesday, January 16, 2008
White Balance
Cite: http://www.cambridgeincolour.com/tutorials/white-balance.htm
To remove White balance, buy photoshop, upload a picture with an inccorect white balance, go onto google and find a tutorial on "how to remove white balance", follow directions in tutorial and WALA!
Thursday, January 3, 2008
Environmental Portraits
Tuesday, October 16, 2007
Wednesday, October 10, 2007
Exposure
The "correct" exposure for a photograph is determined by the sensitivity of the medium used. For photographic film, sensitivity is referred to as film speed and is measured on a scale published by the International organization of standardization(ISO). Faster film requires less exposure and has a higher ISO rating. Exposure is a combination of the length of time and the level of illumination received by the photosensitive material. Exposure time is controlled in a camera by shutter speed and the illumination level by the lens apture. Slower shutter speeds (exposing the medium for a longer period of time) and greater lens apertures (admitting more light) produce greater exposures.
An important principle of exposure is reciprocity. If one exposes the film or sensor for a longer period, a reciprocally smaller aperture is required to reduce the amount of light hitting the film to obtain the same exposure. For example, the photographer may prefer to make his sunny-16 shot at an aperture of f/5.6 (to obtain a shallow depth of field). As f/5.6 is 3 stops 'faster' than f/16, with each stop meaning double the amount of light, a new shutter speed of (1/125)/(2·2·2) = 1/1000 is needed. Once the photographer has determined the exposure, aperture stops can be traded for halvings or doublings of speed, within limits.
Cite:http://en.wikipedia.org/wiki/Exposure_%28photography%29


