Comparison of Sony FE 16-35mm f/2.8 GM SEL1635GM and Tokina 20-35mm f/2.8 AT-X 235 AF PRO

Attribute	Sony FE 16-35mm f/2.8 GM SEL1635GM ×	Tokina 20-35mm f/2.8 AT-X 235 AF PRO ×
Notes	Sony E-mount; Dust and moisture resistant; Includes ALC-SH149 Petal-shaped lens hood.	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Fitted Soft Case
Magnification Ratio (x)	0.19	-
Filter Size (mm)	82	77
Length (mm)	121.6	85.5
Closest Focus (m)	0.28	0.25
Diagonal Angle of View (degree)	63.00 - 107.00	63.20 - 93.60
Focus Details	Internal; Two DDSSM (Direct Drive Super Sonic wave Motor) actuators with Focus Hold button and AF/MF switch	Internal with One-Touch Focus Clutch mechanism
Focal Length (mm)	16.00 - 35.00	20.00 - 35.00
APS Equivalent	24 - 52.5mm	1.5x: 30 - 52.5mm; 1.6x: 32 - 56mm
Brand	Sony	Tokina
Image Circle	35mm (Full-frame E-Mount)	35mm
Name	Sony FE 16-35mm f/2.8 GM SEL1635GM	Tokina 20-35mm f/2.8 AT-X 235 AF PRO
Weight (g)	680	585
Type	Wide Zoom	Wide Zoom
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	11	8
Diaphragm Blades Type	circular	-
Lens Construction	16 elements in 13 groups, including 3 aspherical, 2 XA (extreme aspherical) and 2 ED elements; Nano AR coating; Fluorine coating on the front element	15 elements in 11 groups, including 2 aspherical elements
Zoom System	Rotary	Rotary
Diameter (mm)	88.5	84