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 24-70mm F2.8 GM II
Sony E Mount
The ultimate standard zoom — incredibly sharp, exceptionally compact, and built for professionals.
$2,299
Launch priceReleased Apr 2022
RF 28mm F2.8 STM is 1.1 years newer.
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Wins
RF 28mm F2.8 STM
Wins
FE 24-70mm F2.8 GM II
3 categories tied
Which would you choose?
TL;DR — Key differences
- ARF 28mm F2.8 STM has lower Weight (120 g vs 695 g)
- ARF 28mm F2.8 STM has lower Length (24.7 mm vs 120 mm)
- BFE 24-70mm F2.8 GM II has higher Max magnification (0.32 × vs 0.17 ×)
- ARF 28mm F2.8 STM has lower Diameter (69.2 mm vs 88 mm)
- BFE 24-70mm F2.8 GM II has lower Min focus distance (21 cm vs 23 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 24-70mm F2.8 GM II
⌀88 × 120 mm
695 g (1.53 lb / 24.52 oz)
RF 28mm F2.8 STM is 95mm shorter and 19mm narrower than FE 24-70mm F2.8 GM II.
RF 28mm F2.8 STM is 575 g lighter than FE 24-70mm F2.8 GM II.
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
- ✓
Weight
120 g vs 695 g — lower is better
- ✓
Length
24.7 mm vs 120 mm — lower is better
- ✓
Diameter
69.2 mm vs 88 mm — lower is better
Reasons to choose the FE 24-70mm F2.8 GM II
- ✓
Special elements
Adds 2 XA (extreme aspherical), 3 Aspherical, 2 ED…
- ✓
Weather sealing
Only FE 24-70mm F2.8 GM II supports it
- ✓
Control ring
Only FE 24-70mm F2.8 GM II supports it
- ✓
Custom function button
Only FE 24-70mm F2.8 GM II supports it
- ✓
Max magnification
0.32 × vs 0.17 × — higher is better
- ✓
Min focus distance
21 cm vs 23 cm — lower is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
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 24-70mm F2.8 GM II
Pros
- ✓Outstanding sharpness across the entire zoom range
- ✓Remarkably small and lightweight for an f/2.8 zoom
- ✓Four XD Linear focus motors provide blazing-fast AF tracking
- ✓Excellent close-up magnification
- ✓De-clickable aperture ring and customized function buttons
Cons
- –No built-in optical image stabilization (relies on body IBIS)
- –High launch price
- –Aperture ring can be easily bumped if not locked
Decided which one is right for you?
Compare live prices for the RF 28mm F2.8 STM and FE 24-70mm F2.8 GM II at major authorized retailers.
Canon RF 28mm F2.8 STM
Sony FE 24-70mm F2.8 GM II
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.