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 100-500mm F4.5-7.1L IS USM
Canon RF Mount
Canon's versatile super-telephoto zoom reaching 500mm — ideal for wildlife, sports, and safari without changing lenses.
$2,699
Launch priceReleased Jul 2020
RF 10-20mm F4 L IS USM is 3.3 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 100-500mm F4.5-7.1L IS USM
1 categories tied
TL;DR — Key differences
- ARF 10-20mm F4 L IS USM has lower Min focus distance (24 cm vs 90 cm)
- ARF 10-20mm F4 L IS USM has lower Weight (620 g vs 1370 g)
- BRF 100-500mm F4.5-7.1L IS USM has higher Max magnification (0.33 × vs 0.17 ×)
- ARF 10-20mm F4 L IS USM has lower Length (112.8 mm vs 208 mm)
- ARF 10-20mm F4 L IS USM has lower Max aperture (Tele) (f/4 vs f/7.1)
Key specs at a glance
Size and weight, to scale
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 100-500mm F4.5-7.1L IS USM
⌀93 × 208 mm
1370 g (3.02 lb / 48.33 oz)
RF 10-20mm F4 L IS USM is 95mm shorter and 9mm narrower than RF 100-500mm F4.5-7.1L IS USM.
RF 10-20mm F4 L IS USM is 750 g lighter than RF 100-500mm F4.5-7.1L IS USM.
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
- ✓
Min focus distance
24 cm vs 90 cm — lower is better
- ✓
Special elements
Adds 2 UD, 1 Aspherical
- ✓
Weight
620 g vs 1370 g — lower is better
- ✓
Custom function button
Only RF 10-20mm F4 L IS USM supports it
- ✓
Length
112.8 mm vs 208 mm — lower is better
- ✓
Max aperture (Tele)
f/4 vs f/7.1 — lower is better
- ✓
Max aperture (Wide)
f/4 vs f/4.5 — lower is better
- ✓
Diameter
83.6 mm vs 93 mm — lower is better
Reasons to choose the RF 100-500mm F4.5-7.1L IS USM
- ✓
Special elements
Adds 3 UD, 3 Aspherical
- ✓
Max magnification
0.33 × vs 0.17 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Optical stabilization
Both support optical stabilization
OIS effectiveness
Both 5.5 stops
Weather sealing
Both support weather sealing
Control ring
Both support control ring
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 100-500mm F4.5-7.1L IS USM
Pros
- ✓Incredible 100-500mm reach in a single lens
- ✓5.5-stop optical image stabilization
- ✓Compatible with RF 1.4x and 2x extenders
- ✓Relatively compact for a 500mm-capable zoom
Cons
- –Variable f/4.5-7.1 aperture gets slow at tele end
- –Heavy at full extension (1370g)
- –Expensive for a variable-aperture zoom
Decided which one is right for you?
Compare live prices for the RF 10-20mm F4 L IS USM and RF 100-500mm F4.5-7.1L IS USM at major authorized retailers.
Canon RF 10-20mm F4 L IS USM
Canon RF 100-500mm F4.5-7.1L IS USM
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.