Comparison of Pentax 24-70mm f/2.8ED D FA HD SDM WR and Tokina 28-70mm f/2.8 AT-X 287 AF PRO SV

Attribute	Pentax 24-70mm f/2.8ED D FA HD SDM WR ×	Tokina 28-70mm f/2.8 AT-X 287 AF PRO SV ×
Notes	Weather Resistant; Included Accessories: Lens hood, lens caps and soft case	Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood, Fitted Soft Case
Magnification Ratio (x)	0.2	0.2
Filter Size (mm)	82	77
Length (mm)	109.5	108
Closest Focus (m)	0.38	0.7
Diagonal Angle of View (degree)	34.50 - 84.00	34.33 - 75.33
Focus Details	SDM (Supersonic Direct-drive Motor) with Quick-shift focus system	Internal with Focus Clutch mechanism
Focal Length (mm)	24.00 - 70.00	28.00 - 70.00
APS Equivalent	37 - 107mm	1.5x: 42 - 105mm; 1.6x: 44.8 - 112mm
Brand	Pentax	Tokina
Image Circle	35mm	35mm
Name	Pentax 24-70mm f/2.8ED D FA HD SDM WR	Tokina 28-70mm f/2.8 AT-X 287 AF PRO SV
Weight (g)	787	719
Type	Standard Zoom	Standard Zoom
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	9	8
Diaphragm Blades Type	rounded	-
Lens Construction	17 elements in 12 groups, including 3 ED and 4 aspherical elements, HD coating	16 elements in 12 groups
Zoom System	Rotary	Rotary
Diameter (mm)	88.5	84