Note: This comparison contains unreleased lenses based on rumors and leaks. Specs and images are not official and may change.
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Optics
Focal Length
24-70mm
20-70mm
Zoom Ratio
2.9x
-
Max Aperture
f/2.8
f/2.8
Min Aperture
f/22
-
Elements / Groups
18 / 13
21 / 15
Special Elements
1 Super UD, 2 UD, 3 Aspherical
-
Coatings
Fluorine coating, Super Spectra coating
-
Diaphragm Blades
9
11
Max Magnification
0.21x
-
Focus
Min Focus Dist.
38cm
21cm
Autofocus
AF Motor Type
Ring-type ultrasonic
VCM
Focus Method
Internal
-
Full-time Manual
Distance Scale
Focus Limiter
Physical
Lens Mount
Canon EF
Canon RF
Weight
805 g
865 g
Dimensions (D x L)
89 x 113 mm
88 x 122 mm
Filter Thread
82 mm
82 mm
Weather Sealing
Hood Supplied
Tripod Collar
Features
Image Stabilization
Zoom Method
Rotary (Extending)
-
Power Zoom
Zoom Lock
Aperture Ring
Breathing Correction
Parfocal
Custom Buttons
0
0
Color
Black
Black
General
Launch Price
USD 2299
-
Announce Date
Feb 7, 2012
-
Sensor Format
Full Frame
Full Frame