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
Panasonic
LUMIX S 18mm F1.8
Leica L Mount
LUMIX S 18mm F1.8 — 18mm f/1.8 for Leica L, a popular choice in the panasonic lineup.
$599
Launch priceReleased Nov 2022
LUMIX S 18mm F1.8 is 3.1 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
LUMIX S 18mm F1.8
Which would you choose?
TL;DR — Key differences
- ARF 70-200mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- BLUMIX S 18mm F1.8 has lower Min focus distance (20 cm vs 70 cm)
- BLUMIX S 18mm F1.8 has lower Weight (340 g vs 1070 g)
- BLUMIX S 18mm F1.8 has lower Length (86.5 mm vs 146 mm)
- BLUMIX S 18mm F1.8 has lower Max aperture (Wide) (f/1.8 vs f/2.8)
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
LUMIX S 18mm F1.8
⌀67 × 87 mm
340 g (0.75 lb / 11.99 oz)
RF 70-200mm F2.8L IS USM is 60mm longer and 23mm wider than LUMIX S 18mm F1.8.
RF 70-200mm F2.8L IS USM is 730 g heavier than LUMIX S 18mm F1.8.
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
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Special elements
Adds 1 Super UD, 1 UD
- ✓
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 0.2 × — higher is better
Reasons to choose the LUMIX S 18mm F1.8
- ✓
Min focus distance
20 cm vs 70 cm — lower is better
- ✓
Weight
340 g vs 1070 g — lower is better
- ✓
Special elements
Adds 1 ED
- ✓
Internal focus
Only LUMIX S 18mm F1.8 supports it
- ✓
Length
86.5 mm vs 146 mm — lower is better
- ✓
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
- ✓
Diameter
67 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
LUMIX S 18mm F1.8
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Leica L mount compatibility
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 LUMIX S 18mm F1.8 at major authorized retailers.
Canon RF 70-200mm F2.8L IS USM
Panasonic LUMIX S 18mm F1.8
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 June 2026.