Canon
RF 70-200mm F2.8L IS USM
Canon RF Mount
An incredibly compact, extending telephoto zoom with L-series optics and 5 stops of stabilization.
$2,799
Launch priceReleased Oct 2019
Tamron
11-20mm F2.8 Di III-A RXD
Sony E Mount
11-20mm F2.8 Di III-A RXD — 11–20mm f/2.8 for Sony E, a popular choice in the tamron lineup.
$899
Launch priceReleased May 2021
11-20mm F2.8 Di III-A RXD is 1.6 years newer.
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Wins
RF 70-200mm F2.8L IS USM
Wins
11-20mm F2.8 Di III-A RXD
2 categories tied
TL;DR — Key differences
- ARF 70-200mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- B11-20mm F2.8 Di III-A RXD has lower Weight (335 g vs 1070 g)
- B11-20mm F2.8 Di III-A RXD has lower Min focus distance (38 cm vs 70 cm)
- B11-20mm F2.8 Di III-A RXD has lower Length (97 mm vs 146 mm)
- B11-20mm F2.8 Di III-A RXD has lower Diameter (65 mm vs 90 mm)
Key specs at a glance
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose the RF 70-200mm F2.8L IS USM
- ✓
Special elements
Adds 1 Super UD, 1 UD, 2 Aspherical
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only RF 70-200mm F2.8L IS USM supports it
- ✓
Control ring
Only RF 70-200mm F2.8L IS USM supports it
Reasons to choose the 11-20mm F2.8 Di III-A RXD
- ✓
Special elements
Adds Aspherical
- ✓
Weight
335 g vs 1070 g — lower is better
- ✓
Internal focus
Only 11-20mm F2.8 Di III-A RXD supports it
- ✓
Min focus distance
38 cm vs 70 cm — lower is better
- ✓
Length
97 mm vs 146 mm — lower is better
- ✓
Diameter
65 mm vs 90 mm — lower is better
- ✓
Max magnification
0.25 × vs 0.23 × — higher is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 70-200mm F2.8L IS USM
Pros
- ✓Unbelievably compact storage size thanks to extending barrel
- ✓Very lightweight design (only 1070g)
- ✓Excellent center sharpness at all focal lengths
- ✓Dual Nano USM focus motors offer fast, silent AF
- ✓Exceptional 5-stop optical image stabilization
Cons
- –Extending barrel can draw in dust/moisture over time
- –Not compatible with RF teleconverters (due to rear element position)
- –Vignetting is quite heavy wide open
11-20mm F2.8 Di III-A RXD
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the RF 70-200mm F2.8L IS USM and 11-20mm F2.8 Di III-A RXD at major authorized retailers.
Canon RF 70-200mm F2.8L IS USM
Tamron 11-20mm F2.8 Di III-A RXD
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.