Sony
Alpha 7R III
42MP workhorse for landscape and studio before the A7R IV/V era.
$3,199
Launch priceReleased Oct 2017
Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Alpha 9 III is 6.3 years newer.
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Wins
Alpha 7R III
Wins
Alpha 9 III
2 categories tied
Which would you choose?
TL;DR — Key differences
- AAlpha 7R III has higher Burst (mechanical) (10 fps vs 0 fps)
- BAlpha 9 III has higher Burst (electronic) (120 fps vs 10 fps)
- BAlpha 9 III has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 9 III has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 9 III has higher EVF resolution (9,437,184 vs 3,686,400)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareAlpha 7R III
127 × 96 × 74 mm
657 g (1.45 lb / 23.18 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
Alpha 7R III is 9mm narrower, 1mm shorter, and 9mm thinner than Alpha 9 III.
Alpha 7R III is 46 g lighter than Alpha 9 III.
Depth (front-to-back): 74mm Alpha 7R III · 83mm Alpha 9 III
Sensor size, to scale
Alpha 7R III
35.9 × 24 mm · Full Frame
862 mm² area
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
Alpha 7R III
✓ more lensesSony E
350+
native lenses available
Alpha 9 III
✓ 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
Alpha 7R III
Burst (mechanical)
10 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 126.9, 95.6, 73.7
ISO min (native)
100 vs 250 — lower is better
Card types
Adds SD UHS-I
Resolution
42.4 MP vs 24.6 MP — higher is better
Battery life (CIPA)
650 shots vs 400 shots — higher is better
Codecs
Adds AVCHD
ISO max (native)
32,000 vs 25,600 — higher is better
Reasons to choose
Alpha 9 III
AF low-light limit
-5 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Burst (electronic)
120 fps vs 10 fps — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Subject recognition
Adds Bird, Insect, Car/Train…
EVF resolution
9,437,184 vs 3,686,400 — higher is better
Codecs
Adds XAVC HS, XAVC S-I, H.265
Both cameras share
- ✓AA filter — Both support aa filter
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 7R III
Pros
- ✓42MP proven
- ✓10fps with AF
- ✓Dual slots
- ✓Great used value
Cons
- –Superseded
- –No 8K
- –Older AF
Alpha 9 III
Pros
- ✓Global shutter 120fps
- ✓Zero rolling shutter
- ✓Pro sports AF
- ✓Pre-capture buffer
Cons
- –24.6MP only
- –Premium price
- –Battery drain at max speed
Decided which one is right for you?
Compare live prices for the Alpha 7R III and Alpha 9 III at major authorized retailers.
Sony Alpha 7R III
Sony Alpha 9 III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, Alpha 7R III or Alpha 9 III?
Alpha 9 III scores 10.0/10 versus 3.5/10 for Alpha 7R III — 120fps burst — pro-level action capture.
What's the resolution difference between the Alpha 7R III and Alpha 9 III?
Alpha 7R III is 42.4 MP and Alpha 9 III is 24.6 MP, so the Alpha 7R III captures more detail for cropping and large prints.
Do the Alpha 7R III and Alpha 9 III have in-body image stabilization?
Alpha 7R III has 5.5-stop in-body image stabilization, while Alpha 9 III has 8-stop in-body image stabilization.
Which shoots faster bursts — the Alpha 7R III or the Alpha 9 III?
Alpha 7R III reaches 10 fps electronic. Alpha 9 III reaches 120 fps electronic.
What's the weight difference between the Alpha 7R III and Alpha 9 III?
Alpha 7R III weighs 657 g and Alpha 9 III weighs 703 g, so the Alpha 7R III is 46 g lighter.
Do the Alpha 7R III and Alpha 9 III record 4K video?
Alpha 7R III: 4K up to 30p. Alpha 9 III: 4K up to 120p.
Are the Alpha 7R III and Alpha 9 III weather sealed?
Alpha 7R III: Yes. Alpha 9 III: Yes.
Which has better battery life?
Rated battery life is 650 shots (CIPA) for the Alpha 7R III and 400 shots for the Alpha 9 III, giving the Alpha 7R III the edge.
How much does each cost?
Alpha 7R III launched at $3,199 and Alpha 9 III at $5,999. The Alpha 7R III is $2,800 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Alpha 7R III vs Alpha 9 III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.