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Overview: The Canon EF 24-70mm f/4L IS USM lens is a
standard zoom lens for Canon EOS cameras. The inner focus system and ring-type
USM (ultrasonic motor) gives you faster, more precise auto focusing. The lens
mount has a rubber ring for enhanced dust and water resistance. The 9-blade
circular aperture diaphragm provides beautiful soft backgrounds, while the
fluorine coating on the front and rear lens elements reduces smears and
Macro Shooting: The lens has a macro mode at the telephoto
end for taking close-up photos. To set the lens for macro shooting you must hold
the Macro/Lock switch while rotating the lens past 70mm to the macro setting. In
macro mode, the minimum shooting distance becomes 7.87".
Optical Image Stabilizer (OIS): The Canon Optical Image
Stabilizer (OIS) system delivers the equivalent effect of 3 stops and can detect
normal shooting or panning. It automatically switches to the optimal IS mode
when camera shake is detected. You can turn the OIS on or off using the 2-way
switch on the lens barrel.
Focusing Ring: Regardless of whether you're in manual or
auto focus mode, the full-time focusing ring always works. This means you can
auto focus on a subject, but manually change the focus by turning the focusing
Focus Mode Switch: You can switch between Auto Focus and
Manual Focus using the two-way AF/MF switch on the barrel of the lens.
Zoom Ring Lock: To keep the lens from inadvertently
extending, you can lock the zoom ring to keep the lens at the shortest point.
- Focal Length/Aperture: 24-70mm f/4
- Lens Construction: 15 elements in 12 groups
- Minimum Aperture: f/22
- Maximum Magnification: 0.21x at 70mm, 0.7x in the macro
- Angle of View:
- Diagonal: 84°-34°
- Vertical: 53°-19°
- Horizontal: 74°-29°
- Minimum Focus Distance: 1.25' (0.38m) (0.66'/0.2m in
- Diameter: 3.23"
- Length: 3.96" (4.633" with caps)
- Weight: 21.2 ounces