Canon
RF 28mm F2.8 STM
Canon RF Mount
World's smallest RF lens — 120g pancake with STM AF and 0.23m close focus.
$299
Launch priceReleased May 2023
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 Mar 2025
FE 50mm F1.4 GM is 1.8 years newer.
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Wins
RF 28mm F2.8 STM
Wins
FE 50mm F1.4 GM
1 categories tied
Which would you choose?
TL;DR — Key differences
- ARF 28mm F2.8 STM has lower Length (24.7 mm vs 131 mm)
- ARF 28mm F2.8 STM has lower Weight (120 g vs 580 g)
- BFE 50mm F1.4 GM has lower Max aperture (Wide) (f/1.4 vs f/2.8)
- BFE 50mm F1.4 GM has lower Max aperture (Tele) (f/1.4 vs f/2.8)
- ARF 28mm F2.8 STM has lower Min focus distance (23 cm vs 30 cm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareRF 28mm F2.8 STM
⌀69 × 25 mm
120 g (0.26 lb / 4.23 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.4 GM
⌀81 × 131 mm
580 g (1.28 lb / 20.46 oz)
RF 28mm F2.8 STM is 106mm shorter and 12mm narrower than FE 50mm F1.4 GM.
RF 28mm F2.8 STM is 460 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 28mm F2.8 STM
- ✓
Special elements
Adds 3 PMo
- ✓
Length
24.7 mm vs 131 mm — lower is better
- ✓
Weight
120 g vs 580 g — lower is better
- ✓
Min focus distance
23 cm vs 30 cm — lower is better
- ✓
Diameter
69.2 mm vs 81 mm — lower is better
- ✓
Max magnification
0.17 × vs 0.15 × — higher is better
Reasons to choose the FE 50mm F1.4 GM
- ✓
Special elements
Adds Aspherical, ED
- ✓
Max aperture (Wide)
f/1.4 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/2.8 — lower is better
- ✓
Weather sealing
Only FE 50mm F1.4 GM supports it
- ✓
Control ring
Only FE 50mm F1.4 GM supports it
- ✓
Custom function button
Only FE 50mm F1.4 GM supports it
Shared specifications
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 28mm F2.8 STM
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
- ✓Native Canon RF mount compatibility
Cons
- –Third-party or older alternatives may offer better value
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 28mm F2.8 STM and FE 50mm F1.4 GM at major authorized retailers.
Canon RF 28mm F2.8 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 June 2026.