Comparison of Nikon 28-200mm f/3.5-5.6G ED-IF AF Nikkor and Pentax 18-270mm f/3.5-6.3 ED SDM SMC DA

Attribute	Pentax 18-270mm f/3.5-6.3 ED SDM SMC DA ×	Nikon 28-200mm f/3.5-5.6G ED-IF AF Nikkor ×
Aperture (f)	3.50 - 45.00	3.50 - 36.00
Filter Size (mm)	62	62
Notes	Autofocus supported on K10D and later bodies. Optional Accessories: PH-RBD lens hood, S80-120 case.	Included Accessories: HB-30 Hood
Closest Focus (m)	0.45	0.4
Magnification Ratio (x)	0.26	0.32
Diameter (mm)	75.8	69
Type	Standard Zoom	Standard Zoom
APS Equivalent	27.5 - 414mm	42 - 300mm
Diaphragm Blades	7	7
Image Circle	APS-C	35mm
Focal Length (mm)	18.00 - 270.00	28.00 - 200.00
Brand	Pentax	Nikon
Name	Pentax 18-270mm f/3.5-6.3 ED SDM SMC DA	Nikon 28-200mm f/3.5-5.6G ED-IF AF Nikkor
Weight (g)	453	360
Diagonal Angle of View (degree)	6.00 - 76.00	12.30 - 74.30
Lens Construction	16 elements in 13 groups, including 2 ED and 2 aspherical elements	12 elements in 11 groups, including 3 asperical and 3 ED elements
Zoom System	Rotary, with lock switch	Rotary
Length (mm)	89	71
Diaphragm Blades Type	rounded	-
Focus Details	Internal with supersonic AF motor (SDM)	Internal; Focus Limit Switch