Comparison of Nikon 200-400mm f/4G ED-IF AF-S VR Nikkor and Pentax SMC P-FA 250-600mm f/5.6 ED IF

Attribute	Nikon 200-400mm f/4G ED-IF AF-S VR Nikkor ×	Pentax SMC P-FA 250-600mm f/5.6 ED IF ×
Magnification Ratio (x)	0.27	0.2
Filter Size (mm)	52	43
Focus Details	Internal; Silent Wave Motor	Internal
Closest Focus (m)	1.95	3.5
Lens Construction	24 elements in 17 groups, including 4 ED elements	18 elements in 16 groups, including 1 ED element
Length (mm)	358	442
Focal Length (mm)	200.00 - 400.00	250.00 - 600.00
Diagonal Angle of View (degree)	6.20 - 12.30	4.10 - 9.90
Brand	Nikon	Pentax
Image Circle	35mm	35mm
Name	Nikon 200-400mm f/4G ED-IF AF-S VR Nikkor	Pentax SMC P-FA 250-600mm f/5.6 ED IF
Weight (g)	3300	5049
Type	Telephoto Zoom	Telephoto Zoom
Notes	Image Stabilization; Included Accessories: HK-30 Hood, CL-L2 Soft Case, tripod mounting collar	-
APS Equivalent	300 - 600mm	375 - 900mm
Aperture (f)	4.00 - 22.00	5.60 - 32.00
Diaphragm Blades	9	-
Zoom System	Rotary	Rotary with lock
Diameter (mm)	124	71