Canon
EOS R
Canon’s first full-frame RF mirrorless — launched the RF mount ecosystem.
$2,299
Launch priceReleased Sep 2018
Sony
Alpha 7 IV
33MP hybrid all-rounder with 10-bit 4K 60p and AI-powered subject tracking.
$2,499
Launch priceReleased Oct 2021
Alpha 7 IV is 3.2 years newer.
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Wins
EOS R
Wins
Alpha 7 IV
2 categories tied
Which would you choose?
TL;DR — Key differences
- BAlpha 7 IV has higher RAW buffer depth (828 frames vs 47 frames)
- AEOS R has higher AF points / zones (5655 vs 759)
- BAlpha 7 IV has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 7 IV has higher 4K max frame rate (60 fps vs 29.97 fps)
- BAlpha 7 IV has higher Card slots (2 vs 1)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R
136 × 98 × 84 mm
660 g (1.46 lb / 23.28 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
EOS R is 5mm wider, 2mm taller, and 5mm thicker than Alpha 7 IV.
EOS R is 2 g heavier than Alpha 7 IV.
Depth (front-to-back): 84mm EOS R · 80mm Alpha 7 IV
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R
136 × 98 mm
Credit card
85.6 × 54 mm
Alpha 7 IV
131 × 96 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R
136 × 84 mm
Credit card
85.6 × 54 mm
Alpha 7 IV
131 × 80 mm
Sensor size, to scale
EOS R
36 × 24 mm · Full Frame
864 mm² area
Alpha 7 IV
35.9 × 23.9 mm · Full Frame
858 mm² area
Lens ecosystem
Native lens selection
EOS R
Canon RF
105+
native lenses available
Alpha 7 IV
✓ more lensesSony E
350+
native lenses available
Counts include current first-party and major third-party native autofocus lenses.
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
EOS R
AF low-light limit
-6 EV vs -4 EV — lower is better
Dimensions (W×H×D mm)
Adds 135.8, 98.3, 84.4
Card types
Adds SD, SDHC, SDXC
AF points / zones
5655 vs 759 — higher is better
Pre-Capture / Pre-Release
Only EOS R supports it
Codecs
Adds MP4
Subject recognition
Adds Vehicle
IBIS effectiveness
6 stops vs 5.5 stops — higher is better
Reasons to choose
Alpha 7 IV
Dimensions (W×H×D mm)
Adds 131.3, 96.4, 79.8
Card types
Adds CFexpress Type A, SD UHS-II
RAW buffer depth
828 frames vs 47 frames — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
4K max frame rate
60 fps vs 29.97 fps — higher is better
Animal / bird AF
Only Alpha 7 IV supports it
Subject recognition
Adds Insect, Car/Train, Airplane
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
- ✓EVF refresh rate — Both 120 Hz
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R
Pros
- ✓First Canon RF body
- ✓Dual Pixel AF
- ✓Fully articulating screen
Cons
- –No IBIS
- –Single card slot
- –Superseded by R6/R8
Alpha 7 IV
Pros
- ✓33MP — more detail for cropping and print
- ✓10-bit 4K 60p (Super35 crop) / 4K 30p full-frame
- ✓Full-size HDMI port
- ✓759 phase-detect AF points
Cons
- –4K 60p requires Super35 crop
- –10fps burst lags behind R6 II at 40fps
- –Complex menu system
Decided which one is right for you?
Compare live prices for the EOS R and Alpha 7 IV at major authorized retailers.
Canon EOS R
Sony Alpha 7 IV
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, EOS R or Alpha 7 IV?
Alpha 7 IV scores 7.5/10 versus 3.0/10 for EOS R — 4K recording.
What's the resolution difference between the EOS R and Alpha 7 IV?
EOS R is 30.3 MP and Alpha 7 IV is 33 MP, so the Alpha 7 IV captures more detail for cropping and large prints.
Do the EOS R and Alpha 7 IV have in-body image stabilization?
EOS R has 6-stop in-body image stabilization, while Alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R or the Alpha 7 IV?
EOS R reaches 8 fps electronic. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the EOS R and Alpha 7 IV?
EOS R weighs 660 g and Alpha 7 IV weighs 658 g, so the Alpha 7 IV is 2 g lighter.
Do the EOS R and Alpha 7 IV record 4K video?
EOS R: 4K up to 29.97p. Alpha 7 IV: 4K up to 60p.
Are the EOS R and Alpha 7 IV weather sealed?
EOS R: Yes. Alpha 7 IV: Yes.
How much does each cost?
EOS R launched at $2,299 and Alpha 7 IV at $2,499. The EOS R is $200 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R vs Alpha 7 IV vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Canon and Sony press materials.