Canon EF-S 15–85mm f/3.5–5.6 IS USM vs Canon EF-S 17–85mm f/4–5.6 IS USM

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EF-S 15–85mm f/3.5–5.6 IS USM compared with EF-S 17–85mm f/4–5.6 IS USM

	CanonEF-S 15–85mm f/3.5–5.6 IS USM	CanonEF-S 17–85mm f/4–5.6 IS USM
Overview
Released
Released	October 2009	September 2004
Optics
Lens type
Lens type	Zoom	Zoom
Focal length
Focal length	15–85 mm	17–85 mm
Maximum aperture
Maximum aperture	f/3.5–5.6	f/4–5.6
Minimum aperture
Minimum aperture	f/22–36	f/22–32
Optical construction
Optical construction	17 elements in 12 groups	17 elements in 12 groups
Special elements
Special elements	Three aspherical elements and one UD element according to Canon Japan	One double-sided glass-moulded aspherical element according to Canon Camera Museum
Coatings
Coatings	Canon describes optimised coatings and element positioning to reduce ghosting and flare	–
Diaphragm
Diaphragm	Seven blades with a circular aperture	Six blades with a circular aperture according to Canon Camera Museum
Angle of view
Angle of view	Horizontal 74°10′–15°25′, vertical 53°30′–10°25′, diagonal 84°30′–18°25′	Horizontal 68°40′–15°25′, vertical 48°–10°25′, diagonal 78°30′–18°25′ according to Canon Japan
Mount and compatibility
Mounts
Mounts	Canon EF-S	Canon EF-S
Image circle
Image circle	APS-C	APS-C
Compatibility
Compatibility	Canon EF-S compatible APS-C cameras; equivalent angle of view to 24–136 mm on full frame	Canon EF-S compatible APS-C cameras; equivalent angle of view to 27–136 mm on full frame
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.35 m	0.35 m
Maximum magnification
Maximum magnification	0.21×	0.2×
Optical stabilisation
Optical stabilisation	Yes	Yes
Autofocus detail
Autofocus detail	Ring-type USM with full-time manual focus in One-Shot AF according to Photozone and The Digital Picture	USM autofocus with full-time manual override; Photozone identifies ring-type USM
Focus distance detail
Focus distance detail	Internal focusing and non-rotating front element according to Photozone and The Digital Picture	Minimum focusing distance is 0.35 m throughout the zoom range; front element does not rotate during focusing according to Photozone
Stabilisation detail
Stabilisation detail	Canon states approximately four shutter-speed stops of optical correction; The Digital Picture's tested example achieved four stops at 85 mm and 4⅓ at 15 mm	Canon states approximately three shutter-speed stops of optical correction
Design
Filter diameter
Filter diameter	72 mm	67 mm
Maximum diameter
Maximum diameter	81.6 mm	78.5 mm
Length
Length	87.5 mm	92 mm
Weight
Weight	575 g	475 g (better)
Controls
Controls	AF/MF and stabiliser switches; rear manual-focus ring and distance window	AF/MF and stabiliser switches, distance window, focus and zoom rings
Zoom design
Zoom design	Extends towards the telephoto end using two inner barrel sections according to Photozone	Extending double-trombone barrel according to ePHOTOzine; Photozone reports the shortest length at 17 mm and longest at 85 mm
Dimensions detail
Dimensions detail	81.6 mm maximum diameter × 87.5 mm length according to Canon	78.5 mm maximum diameter × 92 mm length; 475 g according to Canon
Lens hood
Lens hood	Optional EW-78E hood; LP1116 pouch and E-72U cap listed by Canon Japan	EW-73B hood and LP1116 pouch are listed accessories by Canon Japan; ePHOTOzine confirms the hood is optional and not supplied
Release detail
Release detail	Canon Camera Museum and Canon Japan's exact-model support sheet both record October 2009 release. No separately established UK first-sale day is given by these sources.	Canon Camera Museum and Canon Japan record September 2004 marketing; neither source gives a first-sale day