| October: |
Stands for the letter O in the phonetic alphabet. |
| Offshore breeze: |
A wind that blows from the land towards a body of water. Also known as a land breeze. |
| Online photo printer: |
A company that receives digital photos uploaded to its Web site, prints them, then sends the prints back by mail or courier. |
| Opacity: |
The light stopping power of a a material. The greater the opacity of a substance, the more light its stops. In photography, opacity is expressed as a ration of the amount of light falling on the surface of the material to the amount of light transmitted b |
| Operating system: |
The program that controls the camera's or computer's hardware. |
| Operations: |
The takeoffs and landings at an airport. |
| Optical glass: |
Used for manufacturing lenses and prisms. It is specially manufactured to be free of defects and distortion, and to withstand heat and humidity. Each type f optical glass is classified according to its refractive index and light dispersive quality. Two or |
| Optics: |
The science and technology dealing with the behavior of light. |
| Outbound: |
A flight going out of an airport. |
| Outer marker: |
A marker beacon at or near the glideslope intercept altitude of an ILS approach. It is keyed to transmit two dashes per second on a 400 Hz tone, which is received aurally and visually by compatible airborne equipment. The OM is normally located four to se |
| Over-exposure: |
An expression used to indicate that the light sensitive material has been excessively exposed. |
| Overcast: |
Sky condition when greater than 9/10 of the sky is covered by clouds. |
| Ozone: |
A form of oxygen in which the molecule is made of 3 atoms instead of the usual two. Ozone is usually found in the stratosphere, and responsible for filtering out much of the sun's ultraviolet radiation. It is also a primary component of smog. |
 |
|
