KEY FEATURES
- EF-Mount
Lens/Full-Frame Format
- Aperture
Range: f/2.8 to f/22
- One
Super UD Element, Two UD Elements
- Three
Aspherical Elements
- Super
Spectra and Fluorine Coatings
- Ring-Type
Ultrasonic Motor AF System
- Weather-Sealed
Construction
- Rounded
9-Blade Diaphragm
CANON EF
24-70MM F/2.8L II USM OVERVIEW
Spanning
a popular and versatile range of focal lengths, the EF 24-70mm f/2.8L II USM is
a Canon L-series zoom commonly thought of as the workhorse of lenses. Ranging
from wide-angle to portrait length, this lens is also distinguished by its
constant f/2.8 maximum aperture to benefit working in difficult lighting
conditions and to afford greater control over depth of field. The lens is also
characterized by its sophisticated optical design, which includes one Super UD
element and two UD elements, which reduce color fringing and chromatic
aberrations in order to realize a high degree of color accuracy and clarity.
Three aspherical elements are also featured, and minimize distortion and
spherical aberrations for improved sharpness. Additionally, a Super Spectra
coating has been applied to individual elements to control flare and ghosting
for high contrast and neutral color fidelity.
Balancing
the refined optics, this 24-70mm f/2.8 also sports a ring-type USM and internal
focusing mechanism to enable quick, quiet, and accurate autofocus performance,
as well as full-time manual focus override. Additionally, this lens is
weather-sealed and has a protective fluorine coating on the exposed elements
for use in trying environmental conditions. - Standard
zoom is designed for full-frame Canon EF-mount DSLRs, however can also be used
with APS-C models where it provides a 38.4-112mm equivalent focal length range.
- Bright
constant f/2.8 maximum aperture affords consistent illumination throughout the
zoom range and also affords greater control over depth of field for working
with selective focus techniques.
- One
Super Ultra-Low Dispersion element and two ultra-low dispersion glass elements
noticeably reduce color fringing and chromatic aberrations for high clarity and
color fidelity.
- Three
aspherical elements minimize spherical aberrations and distortions for improved
sharpness and accurate rendering.
- Super
Spectra coating has been applied to individual elements to minimize ghosting
and flare for greater contrast and color neutrality when working in strong
lighting conditions.
- A
ring-type Ultrasonic Motor (USM), along with an internal focusing design,
optimized focusing algorithms, and a high-speed CPU, is employed to deliver
fast, precise, and quiet autofocus performance as well as full-time manual
focus override.
- Rounded
nine-blade diaphragm contributes to a pleasing out of focus quality that
benefits the use of shallow depth of field and selective focus techniques.
- Protective
fluorine coating has been applied to the front and rear element to resist
fingerprints and smudges and to make cleaning these elements significantly
easier.
- As
a member of the esteemed L-series, this lens is sealed against dust and
moisture for working in inclement environmental conditions.
- Zoom
lock lever secures the zoom position at the wide end to maintain a compact form
factor and protect the lens when not in use.
CANON EF
24-70MM F/2.8L II USM SPECS
Focal Length
|
24 to 70mm
|
Maximum Aperture
|
f/2.8
|
Minimum Aperture
|
f/22
|
Lens Mount
|
Canon EF
|
Lens Format Coverage
|
Full-Frame
|
Angle of View
|
84° to 34°
|
Minimum Focus Distance
|
1.25' / 38 cm
|
Maximum Magnification
|
0.21x
|
Optical Design
|
18 Elements in 13 Groups
|
Diaphragm Blades
|
9, Rounded
|
Focus Type
|
Autofocus
|
Image Stabilization
|
No
|
Filter Size
|
82 mm (Front)
|
Dimensions (ø x L)
|
3.48 x 4.45" / 88.5 x 113 mm
|
Length at Maximum Extension
|
5.63" / 143 mm
|
|