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 20mm F1.8 G
Sony E Mount
FE 20mm F1.8 G — 20mm f/1.8 for Sony E, a popular choice in the sony lineup.
$899
Launch priceReleased Feb 2020
FE 20mm F1.8 G is 4 months newer.
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Wins
RF 70-200mm F2.8L IS USM
Wins
FE 20mm F1.8 G
TL;DR — Key differences
- ARF 70-200mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- BFE 20mm F1.8 G has lower Weight (373 g vs 1070 g)
- BFE 20mm F1.8 G has lower Min focus distance (30 cm vs 70 cm)
- BFE 20mm F1.8 G has lower Max aperture (Wide) (f/1.8 vs f/2.8)
- BFE 20mm F1.8 G has lower Max aperture (Tele) (f/1.8 vs f/2.8)
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
- ✓
Max magnification
0.23 × vs 0.15 × — higher is better
Reasons to choose the FE 20mm F1.8 G
- ✓
Special elements
Adds Aspherical
- ✓
Weight
373 g vs 1070 g — lower is better
- ✓
Min focus distance
30 cm vs 70 cm — lower is better
- ✓
Internal focus
Only FE 20mm F1.8 G supports it
- ✓
Max aperture (Wide)
f/1.8 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.8 vs f/2.8 — lower is better
- ✓
Length
102 mm vs 146 mm — lower is better
- ✓
Diameter
86 mm vs 90 mm — lower is better
Shared specifications
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
FE 20mm F1.8 G
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓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 FE 20mm F1.8 G at major authorized retailers.
Canon RF 70-200mm F2.8L IS USM
Sony FE 20mm F1.8 G
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.