New Canon EF Lenses See the Light


Canon has just introduced three new EF lenses and a couple of new lens hoods. The lenses are compatible with all of the latest Canon DSLRs, so be sure to get out your wish list and a sharp pencil. Here’s what’s new:

Canon’s EF 24-70mm f/2.8L II USM is a zoom lens with a focal length that extends from 24mm to 70mm. It’s part of Canon’s L Series of lenses, which combines high image quality with enhanced durability. The lens combines two types of aspherical lens elements to limit spherical aberration and improve overall image quality across the full zoom range.

Lens elements that are less than ideal can exhibit an effect known as chromatic aberration, which produces color fringes around the edges of a subject. But Canon's EF lenses use Ultra-Low Dispersion (UD) glass lens elements, Super UD glass elements and fluorite lens elements (all having a very low dispersion index) to limit the effect. The EF 24-70mm f/2.8L II USM uses one Super UD lens element and two UD lens elements to minimize chromatic aberration and eliminate color fringes.

The EF 24-70mm f/2.8L II USM’s optimized lens coatings improve color balance and minimize ghosting, while fluorine coatings on the front and rear lens surfaces reduce smears and fingerprints. The lens features a 9-blade circular diaphragm for soft, pleasing backgrounds. A quiet ring-type Ultrasonic Motor (USM), high-speed CPU and optimized AF algorithms ensure fast autofocusing. The rugged lens is highly resistant to dust and water and a zoom lock lever locks the zoom position at the wide end for safe transporting. The lens comes with caps, a case and the EW-88C hood.

Canon’s EF 24mm f/2.8 IS USM is a prime wide-angle lens. Optical image stabilization provides up to four shutter speed stops of correction, which becomes ever more important as the sun goes down and light levels diminish. Aspherical lens elements improve image quality at the peripherals while a 7-blade circular diaphragm allows for soft, pleasing out-of-focus areas known as bokeh. A ring-type USM, high-speed CPU and optimized AF algorithms combine for fast auto focusing, and the lens also allows full-time manual focus adjustment while in the AF mode. The autofocus USM is quiet enough to make the lens suitable for shooting video.

Offering the same basic features as the 24mm lens is the EF 28mm f/2.8 IS USM, another prime wide-angle lens with optical image stabilization. The EW-65B is an optional hood that fits the two wide-angle lenses. Picking one lens over the other is a matter of personal preference. The 24mm lens basically just gives you a little more elbow room, or an angle of view that’s roughly 10 degrees wider than the 28mm lens. The 24mm lens also changes the perspective more than the 28mm lens; the 24mm lens makes things that are closer appear much larger than they do with a 28mm lens. If you can’t make up your mind as to which lens best suits your needs, you can always just buy both of them.

  EF 24-70mm f/2.8L II USM EF 28mm f/2.8 IS USM EF 24mm f/2.8 IS USM
Focal Length 24-70mm 28mm 24mm
Maximum Aperture f/2.8 f/2.8 f/2.8
Angle of View 73.44-28.5° 65.28° 73.44°
Diaphragm Type 9-blade circular 7-blade circular 7-blade circular
AF Components Ring USM, high-speed CPU, and optimized AF algorithms Ring USM, high-speed CPU, and optimized AF algorithms Ring USM, high-speed CPU, and optimized AF algorithms
Image Stabilization None Optical Optical
Minimum Focusing Distance Not specified by manufacturer 9.1" (23cm) 7.9" (20cm)
Filter Diameter 82mm 58mm 58mm
Other Zoom Lock Lever Manual focus while in AF Manual focus while in AF
Dimensions (D x L) 3.5 x 4.4" (88.9 x 111.8mm) 2.7 x 2" (68.6 x 50.8mm) 2.7 x 2.2" (68.6 x 55.9mm)
Weight 28.4 oz (805.1 g) 9.17 oz (260 g) 9.88 oz (280.1 g)

Discussion 4

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About what time is it due to arrive although it is with a limited release?

Why wasn't IS added to the Mk II version of the 24-70?


Offically, we do not know.  Having had discussions with manufacturers, the impression I get is stabilazation is only seen as a benifit for longer focal length lenses. I disagree but then I do not make these manufacturing decisions.  One thought I have is the lens was made smaller and adding IS may have prevented this. Just a guess.

I'm no lens expert, but arguably all focal lengths can benefit from image stabalization (IS).  Canon's Feb 7, 2012 press relase says the following about IS in new 24 and 28mm f/2.8 lenses:

"With the Optical Image Stabilizer turned on, photographers can capture sharp wide-angle images in low-light settings reducing the need for a flash or a tripod."

I'd venture to guess that the main reasons for not including IS in the 24-70 ii were co$t, weight, and size.