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
Sony
FE 20-70mm F4 G
Sony E Mount
FE 20-70mm F4 G — 20–70mm f/4 for Sony E, a popular choice in the sony lineup.
$1,099
Launch priceReleased Jan 2023
FE 20-70mm F4 G is 3.3 years newer.
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Wins
RF 70-200mm F2.8L IS USM
Wins
FE 20-70mm F4 G
Which would you choose?
TL;DR — Key differences
- ARF 70-200mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- BFE 20-70mm F4 G has lower Min focus distance (30 cm vs 70 cm)
- BFE 20-70mm F4 G has lower Weight (488 g vs 1070 g)
- BFE 20-70mm F4 G has higher Max magnification (0.39 × vs 0.23 ×)
- BFE 20-70mm F4 G has lower Length (99 mm vs 146 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareRF 70-200mm F2.8L IS USM
⌀90 × 146 mm
1070 g (2.36 lb / 37.74 oz)
Credit card
85.6 × 54 mm
for scale
FE 20-70mm F4 G
⌀76 × 99 mm
488 g (1.08 lb / 17.21 oz)
RF 70-200mm F2.8L IS USM is 47mm longer and 14mm wider than FE 20-70mm F4 G.
RF 70-200mm F2.8L IS USM is 582 g heavier than FE 20-70mm F4 G.
Diameter (⌀) is the maximum barrel width; length is measured from the mount to the front of the lens.
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
- ✓
Max aperture (Wide)
f/2.8 vs f/4 — lower is better
- ✓
Max aperture (Tele)
f/2.8 vs f/4 — lower is better
Reasons to choose the FE 20-70mm F4 G
- ✓
Special elements
Adds 3 Aspherical, 1 ED, 1 Super ED
- ✓
Min focus distance
30 cm vs 70 cm — lower is better
- ✓
Weight
488 g vs 1070 g — lower is better
- ✓
Internal focus
Only FE 20-70mm F4 G supports it
- ✓
Length
99 mm vs 146 mm — lower is better
- ✓
Max magnification
0.39 × vs 0.23 × — higher is better
- ✓
Diameter
76 mm vs 90 mm — lower is better
Shared specifications
Weather sealing
Both support weather sealing
Control ring
Both support control ring
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
FE 20-70mm F4 G
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Sony E mount compatibility
Cons
- –No optical stabilization — relies on body IBIS
- –Slower maximum aperture limits low-light performance
Decided which one is right for you?
Compare live prices for the RF 70-200mm F2.8L IS USM and FE 20-70mm F4 G at major authorized retailers.
Canon RF 70-200mm F2.8L IS USM
Sony FE 20-70mm F4 G
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.