Comparison of Pentax 150-450mm f/4.5-5.6ED DC AW HD D FA and Sigma APO 80-400mm f/4.5-5.6 EX OS

Attribute	Pentax 150-450mm f/4.5-5.6ED DC AW HD D FA ×	Sigma APO 80-400mm f/4.5-5.6 EX OS ×
Notes	High Definition (HD) coatings; Super Protect (SP) coatings to external surfaces; weather-resistant construction; removable tripod collar	Image Stabilization; Available AF Mounts: Sigma, Canon, Nikon
Magnification Ratio (x)	0.22	0.2
Filter Size (mm)	86	77
Length (mm)	241.5	192
Closest Focus (m)	2	1.8
Diagonal Angle of View (degree)	5.50 - 16.50	6.20 - 30.30
Focus Details	Internal with DC motor; Quick-Shift Focus System for changing between AF and MF by simply turning the focusing ring; Focus presets and range limiter	Internal
Focal Length (mm)	150.00 - 450.00	80.00 - 400.00
APS Equivalent	225 - 675mm	1.5x: 120 - 600mm; 1.6x: 128 - 640mm
Brand	Pentax	Sigma
Image Circle	35mm	35mm
Name	Pentax 150-450mm f/4.5-5.6ED DC AW HD D FA	Sigma APO 80-400mm f/4.5-5.6 EX OS
Weight (g)	2000	1750
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	4.50 - 27.00	4.50 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	-
Lens Construction	18 elements in 14 groups, including ED elements	20 elements in 14 groups, including 3 SLD elements
Zoom System	Rotary with lock	Rotary with lock
Diameter (mm)	95	95