Comparison of Canon EF 200-400mm f/4L IS USM Extender 1.4X and Nikon 500mm f/4E FL ED AF-S VR Nikkor

Attribute	Nikon 500mm f/4E FL ED AF-S VR Nikkor ×	Canon EF 200-400mm f/4L IS USM Extender 1.4X ×
Aperture (f)	4.00 - 22.00	4.00 - 32.00
Filter Size (mm)	5	52
Notes	Image Stabilization (up to 4 stops correction); Included Accessories: Lens Hood, Case, Tripod Collar	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
Closest Focus (m)	3.6	2
Magnification Ratio (x)	0.14	0.15
Zoom System	n/a	Rotating
Type	Telephoto Prime	Telephoto Zoom
APS Equivalent	750mm	320 - 640mm
Diaphragm Blades	9	9
Image Circle	35mm	35mm
Focal Length (mm)	500.00	200.00 - 400.00
Brand	Nikon	Canon
Name	Nikon 500mm f/4E FL ED AF-S VR Nikkor	Canon EF 200-400mm f/4L IS USM Extender 1.4X
Weight (g)	3090	3620
Diaphragm Blades Type	rounded	circular
Lens Construction	16 elements in 12 groups, including 3 ED and 2 FL elements; Nano Crystal Coat, Super Integrated Coating, Fluorine Coating	25 elements in 20 groups (incl. 1 rear filter); one fluorite and four UD lens elements
Diagonal Angle of View (degree)	5.00	6.20 - 12.00
Length (mm)	387	366
Diameter (mm)	140	128
Focus Details	Internal; Silent Wave Motor; A/M-M/A-M switch; Focus Limiter 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