Learn About Your Oral Health. Delta Dental recently conducted the Preventive Dental Care Study, the largest claims study of its kind. We found that even among insured individuals, many people at higher risk for tooth decay or gum disease aren't getting proper preventive dental care. Are you or your family members at higher-risk?
- Straight photography-term used to describe picture making with minimal manipulation of the photograph ic process. -Stress marks-black lines on a photograph ic emulsion caused by friction or pressure.
Angle of View (Angular Field) - The area size captured by a photographic lens is expressed as a diagonal angular field called Angle of View. The shorter the focal length of a lens, the wider the angle of view (wideangle), while the longer it becomes, the narrower the angle of view (telephoto). (ref. Field of View) Aperture - Lens opening. The opening in a camera lens through which light passes to expose the film. The size of aperture is either fixed, as in a reflex or catadioptric lens, or adjustable. The aperture size controls depth of field.