Lens manufacturers use
different suffixes to identify certain lens characteristics.
Here they are, along with
simple explanation (wherever required) of how they help.
CANON
DO : Diffractive Optics: Special lens
elements that reduce color aberrations to the minimum, thus improving image
quality.
EF : Denotes that the lens is designed
for full-frame cameras
EF-S : Denotes that the lens is designed
for APS-C cameras
IS : Image Stabilizer: Helps to
eliminate/reduce blur caused by camera movement during exposure.
L : ‘Luxury’-series lens: Canon’s high-end, professional
lenses.
NIKON
AF-S : Denotes that the lens is using a
Silent Wave Motor: For fast and quiet autofocus
CRC : Close Range Correction: Allows
lenses to focus closer, while still maintaining good sharpness. This is done
using a ‘floating lens element’ design. Generally used in macro and wide-angle
lenses.
D : Distance information passed on to the camera body:
Helps to provide more accurate exposures
DX : APS-C camera lens
FX : Full-frame camera lens
ED : Extra Low Dispersion glass element:
Corrects for chromatic aberrations
G : Lens without aperture ring; aperture is controlled
from the camera body
N : Nano Crystal Coat: Greatly reduces flare due to
internal reflections of light.
IF : Internal focusing: Instead of moving
all the elements further away or closer to the fi lm/sensor to focus, IF lenses
move only certain internal elements. This allows for much faster focusing.
RF : Rear Focusing: Similar to IF but
only the rear group of elements move to focus the lens.
OLYMPUS
ED : Low Dispersion glass element:
Corrects for chromatic aberrations
PANASONIC
OIS : Optical Image Stabilizer: Helps to
eliminate/reduce blur caused by camera movement during exposure.
Mega OIS : Mega Optical Image Stabilizer
Power OIS : Power Optical Image Stabilizer: A
superior design of Mega OIS.
ED : Low Dispersion glass element
SIGMA
APO : Apochromatic lens element: Corrects
for chromatic as well as spherical aberrations
ASP : Aspherical lens element: Corrects
chromatic aberrations
DC : APS-C camera lens
DG : Full-frame camera lens
HSM : Hyper Sonic Motor: Internal motor,
for fast and quiet autofocus
OS : Optical Stabiliser: Helps to
eliminate/reduce blur caused by camera movement during exposure
RF : Rear Focussing: Only the rear group
of elements move to focus the lens
EX : ‘Excellent’ series lens
TAMRON
AD : Anomalous Dispersion element:
Eliminates lateral chromatic aberration
USD : UltraSonic Silent Drive
ASL : Aspherical lens element: Corrects
chromatic aberrations
Di : Digitally integrated: Full-frame
camera lens designed for digital cameras
Di-II : Digitally integrated: APS-C camera
lens
HID : High Index Dispersion glass element:
Special glass for improving optical performance
LD : Low Dispersion glass: Corrects for
chromatic aberrations
IRF : Internal Rear Focusing: Only the
rear group of elements move to focus the lens
VC : Vibration Correction: Helps to
eliminate/reduce blur caused by camera movement during exposure
PZD : Piezo Drive: Internal motor, for
fast and quiet autofocus
TOKINA
AT-X : ‘Advanced Technology Extra’- range of
lenses
PRO : Professional lens
SD : Super-low Dispersion element:
Corrects chromatic aberrations
PENTAX
SDM : Sonic Direct-drive Motor: Internal
motor, for fast and quiet autofocus
DA : APS-C camera lens
SONY
DT : APS-C camera lens
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