Canon
RF 50mm F1.8 STM
Canon RF Mount
The affordable nifty fifty for RF — compact, sharp, and perfect for beginners exploring prime lenses.
$199
Launch priceReleased Nov 2020
Sony
FE 70-200mm F2.8 GM OSS II
Sony E Mount
The standard telephoto zoom, completely redesigned to be 29% lighter and significantly sharper.
$2,799
Launch priceReleased Oct 2021
FE 70-200mm F2.8 GM OSS II is 11 months newer.
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Wins
RF 50mm F1.8 STM
Wins
FE 70-200mm F2.8 GM OSS II
TL;DR — Key differences
- BFE 70-200mm F2.8 GM OSS II has higher OIS effectiveness (4.5 stops vs 0 stops)
- ARF 50mm F1.8 STM has lower Weight (160 g vs 1045 g)
- ARF 50mm F1.8 STM has lower Length (41 mm vs 200 mm)
- ARF 50mm F1.8 STM has lower Max aperture (Wide) (f/1.8 vs f/2.8)
- ARF 50mm F1.8 STM 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 50mm F1.8 STM
- ✓
Weight
160 g vs 1045 g — lower is better
- ✓
Length
41 mm vs 200 mm — lower is better
- ✓
Control ring
Only RF 50mm F1.8 STM 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
- ✓
Min focus distance
30 cm vs 40 cm — lower is better
- ✓
Diameter
70 mm vs 88 mm — lower is better
Reasons to choose the FE 70-200mm F2.8 GM OSS II
- ✓
Special elements
Adds 1 XA, 1 Aspherical, 1 Super ED…
- ✓
OIS effectiveness
4.5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only FE 70-200mm F2.8 GM OSS II supports it
- ✓
Weather sealing
Only FE 70-200mm F2.8 GM OSS II supports it
- ✓
Custom function button
Only FE 70-200mm F2.8 GM OSS II supports it
- ✓
Max magnification
0.3 × vs 0.25 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 50mm F1.8 STM
Pros
- ✓Incredible value at under $200
- ✓Very compact and lightweight (only 160g)
- ✓Sharp enough for most everyday photography
- ✓Silent STM motor ideal for video
Cons
- –Plastic build feels basic
- –No weather sealing
- –Narrow maximum aperture vs L-series primes
FE 70-200mm F2.8 GM OSS II
Pros
- ✓Extremely lightweight for an f/2.8 telephoto zoom (only 1045g)
- ✓Virtually instantaneous and silent autofocus with 4 XD Linear motors
- ✓Stunning optical performance and contrast across entire range
- ✓Outstanding built-in Optical SteadyShot stabilization
- ✓Dedicated physical aperture ring with click and lock switches
Cons
- –Very high price tag
- –Lens hood is bulky and can block storage space easily
Decided which one is right for you?
Compare live prices for the RF 50mm F1.8 STM and FE 70-200mm F2.8 GM OSS II at major authorized retailers.
Canon RF 50mm F1.8 STM
Sony FE 70-200mm F2.8 GM OSS II
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.