Glossary

Black objects are highly absorbing, making it difficult to capture associated textures such as fur or velvet. Most subjects absorb part of the light that strikes them. The degree to which they absorb light causes the distinctions in color among the shades of gray between pure white and black.

Equal parts of red, green and blue light will produce white. Black is produced when there is a complete absence of light.

Computer monitors, projectors and television screens use additive color.

For outdoor and aerialreconnaissance photography? the things that may affect ambient light are:

• Time of Day
• Cloud cover
• Shadows
• Reflection

Smaller F-Stop numbers indicate a larger opening and therefore more light will enter the camera. Larger apertures are associated with a narrower depth of field.

Unlike shutter priority mode, it is highly likely that an exposure solution can be made given the aperture or F-stop selected. However, the necessary shutter speed may not be acceptable for your shooting situation.

Circumstances may prevent use of augmented lighting techniques in situations where it may be helpful. For example, augmented light is often impossible when shooting live performances as it can be distracting. It is also not generally used in reconnaissance photography?.

Generally the focus occurs at the location of the highlighted sensor in the view finder.

Automatic mode does poorly in the following situations:

• There is little or no contrast between the subject and the background (i.e., the subject is the same color as the background)
• The subject is dominated by regular geometric patterns, such as a row of windows in a building
• The focus area contains areas of sharply contrasting brightness, such as when the target is halfway in the shade
• The subject contains many fine details, such as a field containing patches of snow or light-colored soil or rock

Generally, autostereoscopy employs either eyetracking or the use of multiple images. In the latter approach, the viewer finds an image angle and images that enable viewing of the three dimensional effect.

Backlighting is dramatic light that like front lighting is a poor choice for revealing the three dimensional nature of a subject.

Greater degrees of brightness are associated with higher quality, sharper images that can be achieved by shooting at smaller apertures? and slower ISO settings.

A lens hood? is used to prevent camera flare. Unfortunately, in some cases a hood large enough to block the extraneous light is also large enough to block the field of view. In such circumstances, a gobo? may be a better solution.

In 1038 A.D., Arab scholar Al Hazen? described a working model of the camera obscura but did not construct an actual device. In 1267 A.D. Roger Bacon? was inspired by Al Hazen's work to construct devices that created convincing optical illusions and later to project images of the Sun, a technique that was used to safely view solar eclipses.

The principal was first detailed in writings by Leonardo da Vinci? in 1490 A.D.

This method is designed for conditions where your subject is in the middle of the frame, and the background contains bright lights, dark shadows or other extreme lighting situations that may confuse the metering in the center of your image.

The colors perceives as cool (e.g. blue) map to higher readings on the Kelvin (K) scale. Artistically warmer colors have lower K readings.

Other factors such as composition, exposure, and processing also may influence the contrast within a particular photograph.

• Green - 1.3x (Cannon)
• Red - 1.5x (Nikon DX)
• Blue - 1.6x (Cannon)
• Full frame? - same size as 35mm film (Nikon FX and Cannon full-frame)

A daguerrotype camera produces a direct positive image on silvered copper plates.

The process is named after Louis Daguerre? who developed the process with Joseph Nicéphore Niépce?.

Daylight is a standard that was developed for producing color balanced? film.

Diffuse reflections have equal brightness from any viewing angle. No objects exhibit perfectly diffuse reflection. White objects produce strong diffuse reflections.

Digital photographs may be captured directly by a digital Camera? or scanned? from film slides and negatives, or printed images.

The effects of digital zoom can be replicated by cropping when post processing the image.

To adjust the diopter point the camera to something white like a ceiling tile and turn the diopter until you can read the shooting information inside the view-finder.

A camera directly in line with the reflection will see a large bright spot while one viewing from the side will capture darkness. No objects exhibit perfect direct reflection, water, glass, and metals may approximate it.