Canon EF 24–70mm lens

Canon EF 24–70mm f/2.8L lens with hood (EW-83F)

The Canon EF 24–70mm lens is a family of professional EF mount wide-to-normal zoom lenses manufactured and sold by Canon. The first of the family, the EF 24–70mm f/2.8L, was introduced in 2002 to replace the well-regarded 28–70mm f/2.8L. Two later versions were announced in 2012. The first of these, the EF 24–70mm f/2.8L II, was announced by Canon in February,^[1]^[2]^[3] but would not ship to customers until September of that year.^[4] This lens replaced the Mk I, and had an MSRP of US$2299 when introduced.^[1] The latest member of the family is the EF 24–70mm f/4L IS USM, which became available in January 2014.^[5] The f/4 version, which is the first of the family to include image stabilization, was initially reported to be the standard kit lens for the Canon EOS 6D,^[6] but did not appear in 6D kits in most markets until late 2014, and 5D Mark IV kit in 2016.

Like its predecessor, the f/2.8 Mk I lens was often considered to have excellent contrast, color rendition and decent sharpness wide open.^[7] However, some samples of this lens have also been reported to exhibit deficiencies and operational problems^[8] not present in the older 28–70mm lens, including poor sharpness and/or chromatic aberration. According to the head of a US lens rental firm, the f/2.8 Mk I lens "definitely has some reliability issues and a lot of copy-to-copy variation, at least some of which relate to its design."^[9]

Early reports on the f/2.8 Mk II indicated significant improvement in optical quality. The aforementioned rental firm head stated, All versions of the lens include sealing against dust and water, although they are not waterproof. The f/2.8 Mk I includes an 8-bladed curved diaphragm, while both the f/2.8 Mk II and f/4 include a 9-bladed curved diaphragm. The diaphragm of the f/2.8 Mk I remains nearly circular from f/2.8 to f/5.6, according to the Canon Press release from 2002. Characteristic of zoom lenses, it exhibits some barrel distortion at its shortest focal length.

Reverse zoom

An unusual aspect of the f/2.8 Mk I lens (and the 28–70mm f/2.8L) is that its barrel extends as it zooms toward its shortest focal length. When used with the supplied lens hood, which attaches to a non-moving part of the lens, this extension results in a properly matched shade at every angle of view. Most zoom lens hoods are designed for only the widest angle of view, offering progressively inadequate shade at longer focal lengths.

This reverse zoom is illustrated with the following two pictures:

Lens at 24 mm with a UV filter
Lens at 70 mm with a UV filter
Lens with lens hood

At the telephoto end (70 mm), the end of the lens is the most retracted providing the most shade protection from the lens hood. At the widest end (24 mm), the end of the lens is the most protruding providing the least shade protection from the lens hood.

The f/2.8 Mk II lens, however, has a more conventional design, with the barrel extending as the focal length increases. The lens hood is much shorter than that of the Mk I version.^[9] The f/4 lens shares the same conventional design.

Macro

The f/2.8 versions are not true 1x macro lenses (1:1); the f/2.8 Mk I has a maximum magnification of only 0.29x and the f/2.8 Mk II has 0.21x. The f/4 lens, while also not a true macro lens, is considerably closer to being in that category. The f/4 has a switch-activated "macro" mode; at 70 mm, the maximum magnification is approximately 0.7x and the closest focusing distance is 20 cm.^[6]

Specifications

Attribute	f/2.8L USM	f/2.8L II USM	f/4L IS USM
Image
Key features
Full-frame compatible	Yes
Image stabilizer	No		Yes, Hybrid system (4 stops)
Environmental Sealing	Yes
Ultrasonic Motor	Yes
L-series	Yes
Diffractive Optics	No
Macro	No		Yes
Zoom Lock Lever	No	Yes
Technical data
Maximum Aperture	f/2.8		f/4.0
Minimum Aperture	f/22
Construction	13 groups / 16 elements	13 groups / 18 elements	12 groups / 15 elements
# of diaphragm blades	8	9
Closest focusing distance	0.38 m / 1.25 ft		0.38 m / 1.25 ft (normal mode) 0.20 m / 0.66 ft (macro mode)
Max. magnification	0.29x	0.21x	0.70x
Horizontal viewing angle	74°–29°
Diagonal viewing angle	84°–34°
Vertical viewing angle	53°–19°30'
Physical data
Weight	950 g (34 oz)	805 g (28.4 oz)	600 g (21 oz)
Maximum diameter	83.2 mm (3.3")	88.5 mm (3.5")	83.4 mm (3.3")
Length	123.5 mm (4.9")	113 mm (4.4")	93 mm (3.7")
Filter diameter	77mm	82mm	77mm
Accessories
Lens hood	EW-83F	EW-88C	EW-83L
Retail information
Release date	November 2002	September 2012	December 2012
Currently in production?	No	Yes
MSRP (US$)	$1349.00	$2099.00	$999.00

References

1 2 Canon EF 24-70 f/2.8L II Announced « Canon Rumors. Canonrumors.com (2012-02-07). Retrieved on 2013-10-04.
↑ Canon EF 24-70 f/2.8L Version 1 vs Version 2 « Canon Rumors. Canonrumors.com (2012-02-07). Retrieved on 2013-10-04.
↑ Canon EF 24-70 f/2.8L II « Canon Rumors. Canonrumors.com (2012-02-06). Retrieved on 2013-10-04.
↑ "Canon EF 24–70 f/2.8L II Has Made its Way To Retailers". CanonRumors.com. 2 September 2012. Retrieved 12 September 2012.
↑ "Canon 24-70mm f/4 L IS, Full-Frame EF USM (2012-today)". November 2012. Retrieved 2013-10-03.
1 2 Westlake, Andy (2012-11-06). "Canon EF 24–70 mm f/4 L IS USM Preview". Digital Photography Review. Retrieved 2012-11-06.
↑ Sample crops
↑ FM reviews – Canon EF 24–70 mm f/2.8L USM
1 2 Cicala, Roger (11 September 2012). "Canon 24–70 f/2.8 II Resolution Tests". LensRentals.com. Retrieved 12 September 2012.

External links

Wikimedia Commons has media related to Canon EF 24-70mm F2.8L USM, Canon EF 24-70mm F2.8L II USM and Canon EF 24-70mm F4L IS USM.

Canon EF/EF-S/EF-M lenses

EF-S zoom	EF-S 10–18mm EF-S 10–22mm EF-S 15–85mm EF-S 17–55mm EF-S 17–85mm EF-S 18–55mm EF-S 18–135mm EF-S 18–200mm EF-S 55–250mm

Ultra-wide zoom	EF 11–24mm EF 16–35mm EF 17–40mm

Standard zoom	EF 24–70mm EF 24–105mm EF 28–135mm EF 28–300mm

Telephoto zoom	EF 70–200mm EF 70–300mm EF 75–300mm EF 100–400mm EF 200–400mm

Wide-angle prime	EF 14mm EF 20mm EF 24mm EF-S 24mm EF 28mm EF 35mm

Standard prime	EF 40mm EF 50mm

Telephoto prime	EF 85mm EF 100mm EF 135mm EF 200mm

Super telephoto prime	EF 300mm EF 400mm EF 500mm EF 600mm EF 800mm

Distorting lens	EF 8–15mm Fisheye

Tilt-shift	TS-E 17mm TS-E 24mm TS-E 45mm TS-E 90mm

Macro	EF-M 28mm Macro EF 50mm Compact Macro EF-S 60mm Macro MP-E 65mm 1–5x Macro EF 100mm Macro EF 180mm Macro

EF-M zoom	EF-M 11–22mm EF-M 15–45mm EF-M 18–55mm EF-M 18–150mm EF-M 55–200mm

EF-M prime	EF-M 22mm EF-M 28mm Macro

Lens accessories	Extender EF

Discontinued zoom	EF 17–35mm EF 20–35mm EF 22–55mm EF 24–85mm EF 28–70mm EF 28–80mm EF 28–90mm EF 28–105mm EF 28–200mm EF 35–70mm EF 35–80mm EF 35–105mm EF 35-135mm EF 35–350mm EF 38–76mm EF 50–200mm EF 55–200mm EF 70–210mm EF 80–200mm EF 90–300mm EF 100–200mm EF 100–300mm

Discontinued prime	EF 15mm Fisheye EF 135mm with Softfocus EF 1200mm

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