Lens Q&A
An acranym for Smooth
Autolocus Motor, on In-lens
dnve motor
hot
helps assure
smooth AF response.•
Indicates the lens's focol
length. which determines how
WIde on area the lens can
cover, and how big Ihe subject
will appear to be
IndICates the apprOXimate
distance to he subject
currently ,n focus.•
A focusing ring that enables
manual focus adjustment
when the AF
IMF
swl!ch IS set
toMF
Enables you to quickly SWItch bec and forth
between aulolocuslng (AF) and monual
focusing (MF) •
DT lenses are light. compoc lenses tho are
specthcolly desogned for use WIth digital SLR
comelOs thot incorporate on AJ>S.C
type
Image sensor
Indlcotes the lens's lowest F-number set1,ng
The moiler the number. the more light the
lens con copture
Fixed
focal length lenses (some .mes re erred
to as pome lenses·) differ from zoom lenses
In tho the r focollength connot be adjusted
Minimum fOCUSing distance IS the shortest
d stance. measured from the subject to the
comero's image sensor, at whICh correct
focusconbeach~
• Not O\IOlloble on all lenses
In comero termrnology. the ma Imum
mognllicat on IOlrO r fers to how large on
ObjeCt WIll appear (relalill8 to Its actual
s~e)
at Ihe minimum fOCUSIng distance.
23
Lens Q&A
An acranym for Smooth
Autolocus Motor, on In-lens
dnve motor
hot
helps assure
smooth AF response.•
Indicates the lens's focol
length. which determines how
WIde on area the lens can
cover, and how big Ihe subject
will appear to be
IndICates the apprOXimate
distance to he subject
currently ,n focus.•
A focusing ring that enables
manual focus adjustment
when the AF
IMF
swl!ch IS set
toMF
Enables you to quickly SWItch bec and forth
between aulolocuslng (AF) and monual
focusing (MF) •
DT lenses are light. compoc lenses tho are
specthcolly desogned for use WIth digital SLR
comelOs thot incorporate on AJ>S.C
type
Image sensor
Indlcotes the lens's lowest F-number set1,ng
The moiler the number. the more light the
lens con copture
Fixed
focal length lenses (some .mes re erred
to as pome lenses·) differ from zoom lenses
In tho the r focollength connot be adjusted
Minimum fOCUSing distance IS the shortest
d stance. measured from the subject to the
comero's image sensor, at whICh correct
focusconbeach~
• Not O\IOlloble on all lenses
In comero termrnology. the ma Imum
mognllicat on IOlrO r fers to how large on
ObjeCt WIll appear (relalill8 to Its actual
s~e)
at Ihe minimum fOCUSIng distance.
23