Comparison of Nikon 55-200mm f/4-5.6G ED AF-S DX Nikkor and Pentax SMC P-DA 50-200mm f/4-5.6 ED

Attribute	Nikon 55-200mm f/4-5.6G ED AF-S DX Nikkor ×	Pentax SMC P-DA 50-200mm f/4-5.6 ED ×
Filter Size (mm)	52	52
Notes	DX Nikkor for use with Nikon Digital SLR models only. Lens hood, case included.	Included Accessories: Lens Hood
Closest Focus (m)	0.95	1.1
Magnification Ratio (x)	0.29	0.24
Type	Telephoto Zoom	Telephoto Zoom
Length (mm)	79	78.5
APS Equivalent	82 - 300mm	75 - 300mm
Zoom System	Rotary	Rotary
Image Circle	APS-C	APS-C
Focal Length (mm)	55.00 - 200.00	50.00 - 200.00
Brand	Nikon	Pentax
Name	Nikon 55-200mm f/4-5.6G ED AF-S DX Nikkor	Pentax SMC P-DA 50-200mm f/4-5.6 ED
Weight (g)	255	255
Aperture (f)	4.00 - 32.00	4.00 - 32.00
Diaphragm Blades	9	6
Diagonal Angle of View (degree)	8.00 - 28.80	8.10 - 31.50
Lens Construction	13 elements in 9 groups, including two ED elements	11 elements in 10 groups, including 2 aspherical and 1 ED element
Diameter (mm)	68	66.5
Focus Details	AF-S "Silent Wave" motor	"Quick Shift" AF/MF mechanism