Glossary
aberration Theinabilityofalenstorenderaperfectly
sharp image, generally found towards the edges of an
image,and morecommonly foundwiththeuseofzoom
lenses.
ambientlight Lightthatisalreadynaturallypresentin
the location, whether that is indoors or outside.
angleof view Theviewyou cansee throughthelens,
whichisalwaysdeterminedbythefocallengthofthelens
beingused,withawiderlenshavingtheabilitytorecorda
wider view.
aperture The lens opening, represented as a scale of
f-numbers; thehigher thenumber value the smaller the
aperture.
autofocus Acamerasystemusedtofocusonaparticular
areaoftheimage,offeringthephotographervariousfocus
points to select.
backlighting Whenthesubjectislitfrombehind,suchas
in a silhouetted image at its most extreme.
barn doors A flash lighting modifier enabling the
photographer to control the power and direction of light.