f-number

Aperture size indicator

F-number is a measure of a camera lens's light-gathering ability, expressed as the ratio of focal length to aperture diameter.

A lower f-number (like f/2) means a wider aperture that admits more light and produces shallower depth of field; a higher f-number (like f/16) means a smaller aperture with greater depth of field.

Photographers adjust f-numbers to control exposure and focus: She shot at f/1.8 for that blurry background effect.

aperture

stop

Cease all motion

diaphragmMuscle separating chest, abdomen
irisEye's pigmented disc
openingGap or start

wide-open · f-stop · fast · slow · maximum · minimum · f/8 · f/11 · f/22 · diffraction

depth-of-field

bokeh

Aesthetic quality of defocus

sharpnessKeenness of edge, mind, or image
blurLack of sharpness
backgroundOne's formative experiences

foreground · isolation · separation · shallow · deep · out-of-focus · transition · fall-off · rendering · creamy

exposure

ISO

Global standards body

stopsCeases to continue
meteringControlled measurement of quantity
bracketingTaking varied exposure shots

compensation · histogram · overexposure · underexposure · latitude · low-light · highlight · shadow · reciprocity · EV

lens-design

element

Basic substance or factor

glassTransparent solid from sand
coatingApplied surface covering
barrelHooped cylindrical vessel

mount · prime · zoom · speed · distortion · flare · ghosting · blade · rounded · mechanical

f-number

stop

bokeh

ISO

element

f-number

Opposites

Categories

Family