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 50mm F1.4 GM
Sony E Mount
FE 50mm F1.4 GM — 50mm f/1.4 for Sony E, a popular choice in the sony lineup.
$1,799
Launch priceReleased Feb 2023
FE 50mm F1.4 GM is 2.3 years newer.
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Wins
RF 50mm F1.8 STM
Wins
FE 50mm F1.4 GM
1 categories tied
Which would you choose?
TL;DR — Key differences
- ARF 50mm F1.8 STM has lower Weight (160 g vs 516 g)
- ARF 50mm F1.8 STM has lower Length (41 mm vs 96 mm)
- ARF 50mm F1.8 STM has higher Max magnification (0.25 × vs 0.16 ×)
- ARF 50mm F1.8 STM has lower Min focus distance (30 cm vs 41 cm)
- BFE 50mm F1.4 GM has lower Max aperture (Wide) (f/1.4 vs f/1.8)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareRF 50mm F1.8 STM
⌀70 × 41 mm
160 g (0.35 lb / 5.64 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.4 GM
⌀81 × 96 mm
516 g (1.14 lb / 18.20 oz)
RF 50mm F1.8 STM is 55mm shorter and 11mm narrower than FE 50mm F1.4 GM.
RF 50mm F1.8 STM is 356 g lighter than FE 50mm F1.4 GM.
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 50mm F1.8 STM
- ✓
Weight
160 g vs 516 g — lower is better
- ✓
Length
41 mm vs 96 mm — lower is better
- ✓
Min focus distance
30 cm vs 41 cm — lower is better
- ✓
Diameter
70 mm vs 80.6 mm — lower is better
- ✓
Max magnification
0.25 × vs 0.16 × — higher is better
Reasons to choose the FE 50mm F1.4 GM
- ✓
Special elements
Adds Aspherical, ED
- ✓
Weather sealing
Only FE 50mm F1.4 GM supports it
- ✓
Custom function button
Only FE 50mm F1.4 GM supports it
- ✓
Max aperture (Wide)
f/1.4 vs f/1.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/1.8 — lower is better
Shared specifications
Internal focus
Both support internal focus
Control ring
Both support control ring
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 50mm F1.4 GM
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the RF 50mm F1.8 STM and FE 50mm F1.4 GM at major authorized retailers.
Canon RF 50mm F1.8 STM
Sony FE 50mm F1.4 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.