First Quarter (Moon)

This phase occurs when one-half of the moon is illuminated by direct sunlight. The illuminated part will continue to increase. Learn more on Wikipedia.

Full Moon

This phase occurs when the visible moon is fully illuminated by direct sunlight. At the full moon, the sun and moon are in opposition. Learn more on Wikipedia.

f-number or f-stop

International sequence of numbers, expressing relative aperture, i.e. lens focal length divided by effective aperture diameter. Each change of f-setting halves or doubles image brightness. Learn more on Wikipedia.

Film speed

The measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. Learn more on Wikipedia.

Focal Length

The distance (in mm) from the optical center of the lens to the focal plane. Learn more on Wikipedia.

Field of View (FoV)

In photography, the field of view is that part of the world that is visible through the camera at a particular position and orientation in space; objects outside the FoV when the picture is taken are not recorded in the photograph.

Field of view is expressed in linear measurements (meters, mm; feet, inches) for a given working distance. Learn more on Wikipedia.

Frames Per Second (fps)

The number of frames per second in your video. For example, if you have selected 25 fps you will need 25 photographs to generate one second of video. Learn more on Wikipedia.