Comparison of Pentax HD DA Fish-Eye 10-17mm f/3.5-4.5 ED and Samsung 10-17mm f/3.5-4.5 Fish-Eye Schneider D-XENON

Attribute	Pentax HD DA Fish-Eye 10-17mm f/3.5-4.5 ED ×	Samsung 10-17mm f/3.5-4.5 Fish-Eye Schneider D-XENON ×
Notes	Removable lens hood, lens caps and case included	-
Aperture (f)	3.50 - 32.00	3.50 - 32.00
Closest Focus (m)	0.14	0.14
Magnification Ratio (x)	0.39	0.39
Focus Details	"Quick-Shift" Focus System for instant shift to manual focus	"Quick-Shift" Focus System for instant shift to manual focus once the subject is captured by AF
Length (mm)	70	68
Focal Length (mm)	10.00 - 17.00	10.00 - 17.00
Diameter (mm)	67.5	71.5
Brand	Pentax	Samsung
Image Circle	APS-C	APS-C
Name	Pentax HD DA Fish-Eye 10-17mm f/3.5-4.5 ED	Samsung 10-17mm f/3.5-4.5 Fish-Eye Schneider D-XENON
Weight (g)	323	320
Type	Fisheye Zoom	Fisheye Zoom
Diagonal Angle of View (degree)	100.00 - 180.00	100.00 - 180.00
Diaphragm Blades	6	6
Zoom System	Rotating	Rotary
Lens Construction	10 elements in 8 groups; HD coatings; SP coating on front element	10 elements in 8 groups
APS Equivalent	-	15 - 25.5mm
35mm Equivalent	15 - 25.5mm	-