Comparison of Canon EF 16-35mm f/2.8L USM and Canon EF 16-35mm ƒ/4L IS USM

Attribute	Canon EF 16-35mm ƒ/4L IS USM ×	Canon EF 16-35mm f/2.8L USM ×
Aperture (f)	4.00 - 22.00	2.80 - 22.00
Filter Size (mm)	77	77
Notes	Image Stabilization (up to four stop correction); Dust and moisture resistant; Includes lens hood, soft pouch.	Includes Hood EW-83E, Lens Case LP 1319
Closest Focus (m)	0.28	0.28
Magnification Ratio (x)	0.23	0.22
Diameter (mm)	82.6	83.5
Type	Wide Zoom	Wide Zoom
APS Equivalent	26 - 56mm	26 - 56mm
Diaphragm Blades	9	7
Image Circle	35mm	35mm
Focal Length (mm)	16.00 - 35.00	16.00 - 35.00
Brand	Canon	Canon
Name	Canon EF 16-35mm ƒ/4L IS USM	Canon EF 16-35mm f/2.8L USM
Weight (g)	615	600
Diagonal Angle of View (degree)	63.00 - 108.20	63.00 - 108.20
Lens Construction	16 elements in 12 groups, including 3 aspherical and 2 UD elements, fluorine coating	13 elements in 10 groups, including 3 aspherical and 2 UD elements
Zoom System	Rotary	Rotary
Length (mm)	112.8	103
Diaphragm Blades Type	circular	-
Focus Details	Inner focusing; full-time manual focus and USM	Inner focusing; full-time manual focus and USM;