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TAMRON 17-70mm f/2.8 Di III-A VC RXD vs Tamron 20-40mm f/2.8 Di III VXD

Lens

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Optics
Focal Length
17-70mm
20-40mm
Zoom Ratio
4.1x
2x
Max Aperture
f/2.8
f/2.8
Min Aperture
f/2.8
f/22
Elements / Groups
16 / 12
12 / 11
Diaphragm Blades
9
9
Max Magnification
0.21x
0.26x
Special Elements
-
4 LD, 2 GM aspherical
Coatings
-
BBAR-G2 Coating, Fluorine coating
Optical correction & RAW development
Focus
Min Focus Dist.
19cm
17cm
Autofocus
AF Motor Type
RXD
VXD
Focus Method
Internal
Internal Autofocus With Vxd Linear Motor
Full-time Manual
Distance Scale
Focus Limiter
Physical
Lens Mount
Canon RF
Sony E
Weight
530 g
365 g
Dimensions (D x L)
75 x 117 mm
74 x 87 mm
Filter Thread
67 mm
67 mm
Weather Sealing
Hood Supplied
Tripod Collar
Features
Image Stabilization
Zoom Method
Rotary extending
External
Power Zoom
Zoom Lock
Aperture Ring
Breathing Correction
Parfocal
Custom Buttons
0
0
Color
Black
Black
General
Launch Price
USD 599
USD 699
Announce Date
Jun 24, 2026
Aug 18, 2022
Sensor Format
APS-C
Full Frame