α A-mount Lens -  
SAL20F28

Price: HK$5,690
Type 
Type20mm F2.8
Lens TypeUltra-wide angle
Focal Distance 
Focal distance for 35mm size (mm)20
Focal distance for APS size (mm)30
Aspherical Lenses-
ED Class Lenses-
Angle of View (35mm) (°)94
Angle of View (APS) (°)70
Lens Groups/Elements9/10
Aperture 
Aperture Blades7
Circular ApertureYes
Maximum Magnification Ratio0.13
Maximum Aperture (f/)2.8
Minimum Aperture (f/)22
Minimum Focus (m)0.25
Filter Diameter (mm)72
Feature 
Distance ScaleYes
Non-rotating Focusing Ring in AF Mode-
Focus-Hold Button-
Distance Encoder (ADI Flash metering)-
Depth of field ScaleYes
Focus-Range Limiter-
Super Sonic Wave Motor (SSM)-
General 
Dimensions (Diameter x Length) (Approx.) (mm)78 x 53.5 *3
Diameter (mm)78 *3
Length (mm)53.5 *3
Weight Approx.(g)285 *3
Supplied AccessoriesFront / Rear lens cap, Lens Hood(ALC-SH0013) (Petal Hood)
Remark*3 The figures are tentative and will be informed once confirmed.
Compatible Accessories 
CPL FilterVF-72CPAM
ND FilterVF-72NDAM
MC ProtectorVF-72MPAM
Tele-convertor (1.4x)-
Tele-convertor (2.0x)-
Package1
Price: HK$5,690
SAL20F28
Alpha Lens, 20/2.8