Comparison of Canon EF 600mm ƒ/4L IS II USM and Canon EF 800mm f/5.6L IS USM

Attribute	Canon EF 600mm ƒ/4L IS II USM ×	Canon EF 800mm f/5.6L IS USM ×
Aperture (f)	4.00 - 32.00	5.60 - 32.00
Filter Size (mm)	52	52
Notes	Image Stabilization (up to 4-stops), includes new Mode 3 that activates IS only when the shutter button is fully pressed.	Image Stabilization
Closest Focus (m)	4.5	6
Magnification Ratio (x)	0.15	0.14
Diaphragm Blades Type	-	circular
Type	Telephoto Prime	Telephoto Prime
APS Equivalent	960mm	-
Diaphragm Blades	9	8
Image Circle	35mm	35mm
Focal Length (mm)	600.00	800.00
Brand	Canon	Canon
Name	Canon EF 600mm ƒ/4L IS II USM	Canon EF 800mm f/5.6L IS USM
Weight (g)	3920	4500
Diagonal Angle of View (degree)	4.20	3.08
Length (mm)	448	461
Diameter (mm)	168	162
Focus Details	Inner focusing; full-time manual focus and USM	Internal focusing; full-time manual focus and USM
APS-C Equivalent	-	1280mm
Lens Construction	16 elements in 12 groups (Fluorite: G2 and G4, UD Lens: None)	18 elements in 14 groups, including 1 UD, 1 Super-UD-glass and 2 fluorite elements