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

Attribute	Nikon 200-400mm f/4G ED AF-S VR II 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 SWM (AF-S); AF Recall Mode; Focus Range Limiter (2m to infinity or 6m to infinity); A/M, M/A, M Mode Switch	Internal
Closest Focus (m)	2	3.5
Lens Construction	24 elements in 17 groups, including 4 ED elements; nanocrystal on some elements; SIC	18 elements in 16 groups, including 1 ED element
Length (mm)	365.5	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 AF-S VR II Nikkor	Pentax SMC P-FA 250-600mm f/5.6 ED IF
Weight (g)	3400	5049
Type	Telephoto Zoom	Telephoto Zoom
Notes	VR II Image Stabilization; Included Accessories: HK-30 Lens Shade, CL-L2 Soft Case, Tripod Mounting Collar, 52mm NC (Neutral Clear) Filter (drop-in)	-
APS Equivalent	300 - 600mm	375 - 900mm
Aperture (f)	4.00 - 32.00	5.60 - 32.00
Diaphragm Blades	9	-
Zoom System	Rotary	Rotary with lock
Diameter (mm)	124	71