SIGMA Glossary

A

• AFL button
• Aperture ring
• Aperture ring click switch
• Aperture ring lock switch
• APO
• Art
• Aspherical lens
• Aspherical（ASP.）

C

• Canon camera compatibility
• CFRP(Carbon Fiber Reinforced Plastic )
• Compatible with Lens Aberration Correction
• Contemporary

D

• DC
• DG
• Distortion guide
• DN
• Dual Action Zoom
• Diffraction MTF / Geometrical MTF
• Dust and Splash Resistant Structure

E

• Edition number
• EX
• Exclusive low-dispersion glass

F

• Fill Light
• FLD (“F” Low Dispersion) glass
• Floating system
• Focus Limiter
• Focus Mode Switch
• Full-time MF

H

• High-precision, rugged brass bayonet mount
• Hood with lock
• HSM (Hyper Sonic Motor)
• High-precision magnetic sensor

I

• Inner focus system
• Inner Zoom
• Intelligent OS

L

• Lens categories for all major standards
• Linear focus / Non-linear focus
• Linear motor

M

• MO (Manual Override）
• Mount with Dust and Splash Resistant Structure
• MTF chart guide

N

• Nano Porous Coating
• Nikon electromagnetic diaphragm mechanism
• Nikon F mount camera compatibility

O

• OS (Optical Stabilizer) function

R

• Rounded diaphragm

S

• Sports
• Stepping Motor
• Super Multi-Layer Coating

T

• Tripod socket compatible with Arca Swiss type screw knob clamp
• TSC (Thermally Stable Composite)

V

• Vignetting guide

W

• Water and oil repellent coating

Z

• Zoom lock switch (Can be set at any focal length)
• Zoom lock switch (Wide end)