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 300mm F2.8 GM OSS
Sony E Mount
World's lightest 300mm F2.8 — 1470g with XD Linear AF, OSS, and G Master resolution.
$6,999
Launch priceReleased Jan 2024
FE 300mm F2.8 GM OSS is 5 months newer.
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Wins
RF 135mm F1.8 L IS USM
Wins
FE 300mm F2.8 GM OSS
Which would you choose?
TL;DR — Key differences
- ARF 135mm F1.8 L IS USM has lower Min focus distance (70 cm vs 200 cm)
- ARF 135mm F1.8 L IS USM has lower Length (130.4 mm vs 265 mm)
- ARF 135mm F1.8 L IS USM has higher Max magnification (0.29 × vs 0.16 ×)
- ARF 135mm F1.8 L IS USM has lower Weight (935 g vs 1470 g)
- ARF 135mm F1.8 L IS USM has lower Max aperture (Wide) (f/1.8 vs f/2.8)
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 300mm F2.8 GM OSS
⌀124 × 265 mm
1470 g (3.24 lb / 51.85 oz)
RF 135mm F1.8 L IS USM is 135mm shorter and 35mm narrower than FE 300mm F2.8 GM OSS.
RF 135mm F1.8 L IS USM is 535 g lighter than FE 300mm F2.8 GM OSS.
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
- ✓
Min focus distance
70 cm vs 200 cm — lower is better
- ✓
Length
130.4 mm vs 265 mm — lower is better
- ✓
Weight
935 g vs 1470 g — lower is better
- ✓
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
- ✓
Diameter
89 mm vs 124 mm — lower is better
- ✓
Max magnification
0.29 × vs 0.16 × — higher is better
Reasons to choose the FE 300mm F2.8 GM OSS
- ✓
Special elements
Adds 3 Super ED, 1 ED
Shared specifications
Internal focus
Both support internal focus
Optical stabilization
Both support optical stabilization
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 300mm F2.8 GM OSS
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
Decided which one is right for you?
Compare live prices for the RF 135mm F1.8 L IS USM and FE 300mm F2.8 GM OSS at major authorized retailers.
Canon RF 135mm F1.8 L IS USM
Sony FE 300mm F2.8 GM OSS
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.