Graphics Programs Reference
In-Depth Information
N (Nano Crystal Coat) Internal elements coated with a nano crystal solution which
eliminates reflections created by most wavelengths. This produces better quality images.
PC-E (Perspective Control with an electromagnetic diaphragm ) Similar to Canon's
TS-E lenses.
RF (Rear Focusing)
Creates improved compactness.
SIC (Super Integrated Coating) Multilayer coating minimizes lens flare and ghosting.
SWM (Silent Wave Motor) Uses ultrasonic traveling waves during lens autofocus pro-
cess.
VR (Vibration Reduction) Similar to Canon's Image Stabilization (IS) system.
Sigma Lenses:
APO (Apochromatic ) Similar to Nikon's ED technology.
APS (Aspherical ) Similar to Canon's DO.
DC For cameras with APS-C sized sensors. Similar to Canon's EF-S and Nikon's DX
mounts.
DG Similar to Canon's EF and Nikon's FX mounts.
DN For use with mirrorless interchangeable lens cameras and will not fit typical SLRs.
EX (Excellence)
Similar to Canon's L lenses.
HF (Helical Focusing) Keeps front element of a lens from rotating. Especially useful
when using filters.
HSM (HyperSonic Motor) Similar to Canon's USM and Nikon's AF-S systems.
OS (Optical Stabilization) Similar to Canon's IS and Nikon's VR functions.
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