Canon
RF 10-20mm F4 L IS USM
Canon RF Mount
RF 10-20mm F4 L IS USM — 10–20mm f/4 for Canon RF, a popular choice in the canon lineup.
$2,299
Launch priceReleased Oct 2023
Canon
RF 85mm F1.4 L VCM
Canon RF Mount
Hybrid L-series 85mm with VCM autofocus, manual iris ring, and weather sealing.
$1,649
Launch priceReleased Feb 2025
RF 85mm F1.4 L VCM is 1.3 years newer.
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Wins
RF 10-20mm F4 L IS USM
Wins
RF 85mm F1.4 L VCM
Which would you choose?
TL;DR — Key differences
- ARF 10-20mm F4 L IS USM has higher OIS effectiveness (5.5 stops vs 0 stops)
- ARF 10-20mm F4 L IS USM has lower Min focus distance (24 cm vs 75 cm)
- BRF 85mm F1.4 L VCM has lower Max aperture (Wide) (f/1.4 vs f/4)
- BRF 85mm F1.4 L VCM has lower Max aperture (Tele) (f/1.4 vs f/4)
- ARF 10-20mm F4 L IS USM has higher Max magnification (0.17 × vs 0.12 ×)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share
RF 10-20mm F4 L IS USM
⌀84 × 113 mm
620 g (1.37 lb / 21.87 oz)
Credit card
85.6 × 54 mm
for scale
RF 85mm F1.4 L VCM
⌀77 × 99 mm
636 g (1.40 lb / 22.43 oz)
RF 10-20mm F4 L IS USM is 14mm longer and 7mm wider than RF 85mm F1.4 L VCM.
RF 10-20mm F4 L IS USM is 16 g lighter than RF 85mm F1.4 L VCM.
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 10-20mm F4 L IS USM
- ✓
OIS effectiveness
5.5 stops vs 0 stops — higher is better
- ✓
Min focus distance
24 cm vs 75 cm — lower is better
- ✓
Special elements
Adds 2 UD, 1 Super UD
- ✓
Optical stabilization
Only RF 10-20mm F4 L IS USM supports it
- ✓
Max magnification
0.17 × vs 0.12 × — higher is better
- ✓
Weight
620 g vs 636 g — lower is better
Reasons to choose the RF 85mm F1.4 L VCM
- ✓
Max aperture (Wide)
f/1.4 vs f/4 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/4 — lower is better
- ✓
Special elements
Adds 1 UD
- ✓
Length
99.3 mm vs 112.8 mm — lower is better
- ✓
Diameter
76.5 mm vs 83.6 mm — lower is better
Shared specifications
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 10-20mm F4 L IS USM
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Slower maximum aperture limits low-light performance
RF 85mm F1.4 L VCM
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 10-20mm F4 L IS USM and RF 85mm F1.4 L VCM at major authorized retailers.
Canon RF 10-20mm F4 L IS USM
Canon RF 85mm F1.4 L VCM
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.