Comparison of Pentax 11-18mm f/2.8 ED DC AW HD DA* and Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD

Attribute	Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD ×	Pentax 11-18mm f/2.8 ED DC AW HD DA* ×
Notes	Available AF Mounts: Canon and Nikon Digital Only; Built-in AF motor for use with all Nikon DSLRs; Included Accessories: BH-823 Lens Hood	Dustproof, weather-resistant construction; Features latest lens coatings.
Magnification Ratio (x)	0.12	0.1
Filter Size (mm)	82	82
Length (mm)	106	100
Closest Focus (m)	0.28	0.3
Diagonal Angle of View (degree)	71.80 - 91.70	76.00 - 104.00
Focus Details	Internal with One-Touch Focus Clutch mechanism	AF with DC motor; Focus Clamp Mechanism; AF/MF switch
Focal Length (mm)	14.00 - 20.00	11.00 - 18.00
APS Equivalent	1.5x: 21 - 30mm; 1.6x: 22.4 - 32mm	17 - 27.5mm
Brand	Tokina	Pentax
Image Circle	APS-C	APS-C
Name	Tokina 14-20mm f/2 AT-X 142 AF PRO DX SD	Pentax 11-18mm f/2.8 ED DC AW HD DA*
Weight (g)	725	704
Type	Wide Zoom	Wide Zoom
Aperture (f)	2.00 - 22.00	2.80 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	-	rounded
Lens Construction	13 elements in 11 groups, including 3 aspherical and 4 SD elements	16 elements in 11 groups
Zoom System	Rotary	Rotary
Diameter (mm)	89	90