Comparison of Canon EF 200-400mm f/4L IS USM Extender 1.4X and Nikon 800mm f/5.6E FL ED AF-S VR Nikkor

Attribute	Nikon 800mm f/5.6E FL ED AF-S VR Nikkor ×	Canon EF 200-400mm f/4L IS USM Extender 1.4X ×
Notes	VR Image Stabilization (up to 4 stops)	Built-in 1.4x extender (8 elements in 4 groups) switches to 280-560mm f/5.6 lens with 0.21x / 1.48 magnification ratio; 4-stop Image Stabilization
Magnification Ratio (x)	0.151	0.15
Filter Size (mm)	52	52
Length (mm)	461	366
Closest Focus (m)	5.9	2
Diagonal Angle of View (degree)	3.20	6.20 - 12.00
Focus Details	Internal; Silent Wave Motor; A/M, M/A, M switch; Memory Recall switch	Inner focusing; Full-time manual focus and ring USM; Ring USM, High-speed CPU and optimized AF algorithms; Power Focus mode; Focus Limiter
Focal Length (mm)	800.00	200.00 - 400.00
APS Equivalent	1200mm	320 - 640mm
Brand	Nikon	Canon
Image Circle	35mm	35mm
Name	Nikon 800mm f/5.6E FL ED AF-S VR Nikkor	Canon EF 200-400mm f/4L IS USM Extender 1.4X
Weight (g)	4600	3620
Type	Telephoto Prime	Telephoto Zoom
Aperture (f)	5.60 - 32.00	4.00 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	-	circular
Lens Construction	20 elements in 13 groups, including 2 ED glass elements, 2 fluorite elements and Nano Crystal Coat	25 elements in 20 groups (incl. 1 rear filter); one fluorite and four UD lens elements
Zoom System	n/a	Rotating
Diameter (mm)	160	128