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.
From the figure above, simple geometry gives the horizontal field of view. where width is the horizontal width of the sensor (projection plane). So for example, for a 35mm film (frame is 24mm x 36mm), and a 20mm (focal length) lens, the horizontal aperture would be almost 84 degrees (vertical aperture of 62 degrees).