Join Ben Long for an in-depth discussion in this video How a camera's image sensor captures an image, part of Photography Foundations: Black and White.
In the back of your camera, directly behind the lens, is a small computer chip…that has an area of light- sensitive material on it.…This is the camera's image sensor, and it's what actually captures light…and makes an image.…It's the digital equivalent of a piece of film, or the back of your eyeball.…The surface of the image sensor is divided into a grid, with one cell for each…pixel that the sensor can capture.…So if you have a 10-megapixel camera, the sensor is divided into a grid of 10 million cells.…
Each one of these cells contains a type of metal in it that emits electrons…when struck by light.…The more light that strikes an area, the more electrons that get emitted.…By reading the voltage at each one of these cells, and these cells are called photosites,…by reading the voltage, we can find out exactly how much light has struck each pixel.…In other words, we can capture an image.…Now here is the kicker.…There is no color in this image.…All that the sensor detects is how much light has struck each pixel.…
- Why shoot in black and white
- How to recognize good black-and-white subject matter
- Preparing the camera
- Shooting a tone-based subject
- Exposing for black and white
- Understanding grayscale
- Converting from color to black and white using Photoshop CS4 or CS5
- Converting to black and white in Camera Raw
- Toning and split-toning
- Comparing high key versus low key images
- Preparing a black and white image for print
Skill Level Intermediate
2. What Is Black-and-White Photography?
3. Shooting in Black and White
4. Black-and-White Post-Production
5. Printing in Black and White
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