Comparison of Canon EF 24-105mm ƒ/3.5-5.6 IS STM and Canon EF-S 17-85mm f/4-5.6 IS USM

Attribute	Canon EF 24-105mm ƒ/3.5-5.6 IS STM ×	Canon EF-S 17-85mm f/4-5.6 IS USM ×
Notes	Image Stabilization (4 stops)	EF-S lens mount, exclusively for EOS 20D, Digital Rebel, and newer bodies with APS-C sensors.
Magnification Ratio (x)	0.3	0.2
Filter Size (mm)	77	67
Length (mm)	104	92
Closest Focus (m)	0.4	0.35
Diagonal Angle of View (degree)	23.30 - 84.00	18.40 - 78.50
Focus Details	Stepping motor (STM) for smooth, near silent AF when shooting stills and movies; full-time manual focus	Inner focusing; full-time manual focus and USM
Focal Length (mm)	24.00 - 105.00	17.00 - 85.00
APS Equivalent	38 - 168mm	27 - 136mm
Brand	Canon	Canon
Image Circle	35mm	APS-C
Name	Canon EF 24-105mm ƒ/3.5-5.6 IS STM	Canon EF-S 17-85mm f/4-5.6 IS USM
Weight (g)	525	475
Type	Standard Zoom	Standard Zoom
Aperture (f)	3.50 - 36.00	4.00 - 32.00
Diaphragm Blades	7	6
Diaphragm Blades Type	rounded	-
Lens Construction	17 elements in 13 groups, including 2 aspherical and 1 UD element	17 elements in 12 groups, including 1 aspherical element
Zoom System	Rotary	Rotary
Diameter (mm)	83.4	78