Canon
RF 135mm F1.8 L IS USM
Canon RF Mount
RF 135mm F1.8 L IS USM — 135mm f/1.8 for Canon RF, a popular choice in the canon lineup.
$2,099
Launch priceReleased Aug 2023
Sony
FE 135mm F1.8 GM
Sony E Mount
FE 135mm F1.8 GM — 135mm f/1.8 for Sony E, a popular choice in the sony lineup.
$1,899
Launch priceReleased Feb 2019
RF 135mm F1.8 L IS USM is 4.5 years newer.
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Wins
RF 135mm F1.8 L IS USM
Wins
FE 135mm F1.8 GM
2 categories tied
Which would you choose?
TL;DR — Key differences
- ARF 135mm F1.8 L IS USM has higher OIS effectiveness (5.5 stops vs 0 stops)
- BFE 135mm F1.8 GM has lower Min focus distance (30 cm vs 70 cm)
- ARF 135mm F1.8 L IS USM has higher Max magnification (0.29 × vs 0.15 ×)
- ARF 135mm F1.8 L IS USM has lower Length (130.4 mm vs 183 mm)
- BFE 135mm F1.8 GM has lower Diameter (81 mm vs 89 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to shareRF 135mm F1.8 L IS USM
⌀89 × 130 mm
935 g (2.06 lb / 32.98 oz)
Credit card
85.6 × 54 mm
for scale
FE 135mm F1.8 GM
⌀81 × 183 mm
950 g (2.09 lb / 33.51 oz)
RF 135mm F1.8 L IS USM is 53mm shorter and 8mm wider than FE 135mm F1.8 GM.
RF 135mm F1.8 L IS USM is 15 g lighter than FE 135mm F1.8 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 135mm F1.8 L IS USM
- ✓
Special elements
Adds 1 UD, 1 Aspherical
- ✓
OIS effectiveness
5.5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only RF 135mm F1.8 L IS USM supports it
- ✓
Length
130.4 mm vs 183 mm — lower is better
- ✓
Max magnification
0.29 × vs 0.15 × — higher is better
- ✓
Weight
935 g vs 950 g — lower is better
Reasons to choose the FE 135mm F1.8 GM
- ✓
Special elements
Adds Aspherical
- ✓
Min focus distance
30 cm vs 70 cm — lower is better
- ✓
Diameter
81 mm vs 89 mm — lower is better
Shared specifications
Max aperture (Wide)
Both f/1.8
Max aperture (Tele)
Both f/1.8
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Custom function button
Both support custom function button
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 135mm F1.8 L IS USM
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Relatively heavy for extended handheld use
FE 135mm F1.8 GM
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Sony E mount compatibility
Cons
- –Relatively heavy for extended handheld use
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the RF 135mm F1.8 L IS USM and FE 135mm F1.8 GM at major authorized retailers.
Canon RF 135mm F1.8 L IS USM
Sony FE 135mm F1.8 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.