EF24-70mm f/2.8L II USM

EF24-70mm f/2.8L II USM

The evolution of this new version of Canon’s leading large-diameter standard zoom lens was based on extensive feedback from professional photographers and ongoing study of the characteristics of light. Incorporating three high-precision aspherical, one super UD and two UD lens elements, this lens achieves new levels of outstanding image quality. In response to the increased shooting volume associated with digital cameras and demands for reliability in even the most severe conditions, the retentive part of the zooming extension has been enlarged to enhance durability. Every critical component of the lens features dust-proof, drip-proof construction. A 145g (5.1oz) reduction in weight and 1cm (0.5in) reduction in length contribute to improved usability.

SAMPLE PHOTOS

  • EF24-70mm f/2.8L II USM, Canon EOS 5D Mark II, 0.4sec., f/2.8, ISO100
  • EF24-70mm f/2.8L II USM, Canon EOS 5D Mark II, 1/160sec., f/2.8, ISO200
  • EF24-70mm f/2.8L II USM, Canon EOS 5D Mark II, 1/60sec., f/5.6, ISO100
  • EF24-70mm f/2.8L II USM, Canon EOS 5D Mark II, 1/640sec., f/2.8, ISO100

SPECS

Construction
(groups-elements)
13-18
Angle of View
(horizontal, vertical, diagonal)
74°−29°/ 53°−19°30’/ 84°−34°
No. of Diaphragm Blades 9
Closest Focusing Distance 0.38m
Maximum Magnification 0.21x (at 70mm)
Water/dust Resistance Yes
Filter Size 82mm
Max. Diameter x Length Ø88.5 × 113mm
Weight Approx. 805g
Extension Tube EF12 II 0.45−0.18x
Extension Tube EF25 II 0.74−0.41x
Lens Cap E-82U / E-82 II
Lens Hood EW-88C
Lens Pouch/Case LP1219

  • Super UD element
  • UD element
  • Ground aspherical lens
  • GMo aspherical lens
  • Fluorine Coating

MTF Characteristics

Spatial frequency Maximum aperture
S M
10 lines/mm
30 lines/mm
How to read
MTF characteristics

Spatial frequency Maximum aperture
S M
10 lines/mm
30 lines/mm

The more the S and M curves are in line, the more natural the blurred image becomes.

Modulation Transfer Function, or MTF, is a method of evaluating lens performance using contrast reproduction ratio. When evaluating the electrical characteristics of audio equipment, one important measure of performance is frequency response. This indicates the fidelity of the reproduced sound with respect to the source sound as it passes through the microphone, recording and playback circuits, and finally the speakers. When the reproduction is accurate, the equipment is classified as “hi-fi,” or “high fidelity.”
In the same way, when a lens is viewed as a transmission system for optical signals, measuring the frequency response of the optical system reveals whether the optical signal is transmitted faithfully. For a lens, the equivalent of frequency is “spatial frequency,” which indicates how many patterns, or cycles, of changes in sinusoidal density are present in a 1 mm width. Accordingly, the unit of spatial frequency is lines per mm, as opposed to Hz in electrical systems.

The MTF characteristics shown on this website are 10 lines/mm and 30 lines/mm, where the horizontal axis indicates image height (the distance on a diagonal line from the center of the image, in mm) with the image center set to 0, and the vertical axis indicates contrast. The closer the 10-line/mm curve is to 1, the better the contrast and clarity of the lens; the closer the 30-line/mm curve is to 1, the better the resolving power and sharpness of the lens. Although a good balance between both of these is important for a lens to be sharp and clear, a lens is generally said to offer excellent image quality if the 10-line/mm curve is greater than 0.8, or satisfactory image quality if greater than 0.6.

Resolving power and contrast are both good

Contrast is good; resolving power is poor

Resolving power is good; contrast is poor