Canon EF 28mm f/1.8 USM vs Canon EF 28mm f/2.8

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EF 28mm f/1.8 USM compared with EF 28mm f/2.8

	CanonEF 28mm f/1.8 USM	CanonEF 28mm f/2.8
Overview
Released
Released	September 1995	April 1987
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	28 mm	28 mm
Maximum aperture
Maximum aperture	f/1.8	f/2.8
Minimum aperture
Minimum aperture	f/22	f/22
Optical construction
Optical construction	Ten elements in nine groups	Five elements in five groups
Special elements
Special elements	Aspherical lens element	One moulded glass aspherical element, at the front of the optical system
Diaphragm
Diaphragm	Seven blades	Five blades
Angle of view
Angle of view	75° diagonal, 65° horizontal and 46° vertical	75° diagonal, 65° horizontal and 46° vertical according to Canon's manual
Mount and compatibility
Mounts
Mounts	Canon EF	Canon EF
Image circle
Image circle	Full frame	Full frame
Compatibility
Compatibility	Canon EF cameras with full-frame or APS-C sensors	Canon EF cameras with full-frame or APS-C sensors
Adaptor support
Adaptor support	EF12 II extension tube gives 0.61–0.43× magnification; EF25 II gives 1.13–0.96×	–
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.25 m	0.3 m
Maximum magnification
Maximum magnification	0.18×	0.13×
Autofocus detail
Autofocus detail	USM autofocus with mechanical full-time manual focusing. Canon's manual specifies turning the ring with the shutter half-pressed after One Shot AF	Conventional motor autofocus according to Photozone; no full-time manual override according to The Digital Picture
Focus distance detail
Focus distance detail	Physical length remains constant and the front element does not rotate according to Photozone	Mechanical manual focusing; Canon's manual requires the MF switch position. Inner tube extends towards close focus but the front does not rotate according to Photozone
Design
Filter diameter
Filter diameter	58 mm	52 mm
Maximum diameter
Maximum diameter	73.6 mm	67.4 mm
Length
Length	55.6 mm	42.5 mm
Weight
Weight	310 g	185 g (better)
Controls
Controls	AF/MF switch, focus ring, distance window, depth-of-field scale and infrared focus index	AF/MF switch, focus ring, distance window, depth-of-field scale and infrared focus index
Dimensions detail
Dimensions detail	Maximum diameter × length in retracted state; dimensions and 310 g weight are lens-only. Front and rear caps add 21.5 mm according to Canon's manual	67.4 mm maximum diameter × 42.5 mm length; dimensions and 185 g weight are lens-only. Front and rear caps add 21.5 mm according to Canon's manual
Lens hood
Lens hood	Optional EW-63 II petal hood; reversible for storage according to Canon's manual	EW-65 II reversible hood according to Canon's manual
Release detail
Release detail	Canon Camera Museum records September 1995 marketing; no first-sale day is given	Canon Camera Museum records April 1987 marketing; no first-sale day is given