Sony
Alpha 7R VI
66.8MP fully-stacked full-frame high-resolution body with 30fps bursts, 8K 30p, 4K 120p, and Sony's new BIONZ XR2 engine.
$4,499
Released Jun 2026
Sony
FX3
Compact full-frame cinema line camera with S-Cinetone and pro video ergonomics.
$3,899
Released Feb 2021
Alpha 7R VI is 5.3 years newer.
Wins
Alpha 7R VI
Wins
FX3
4 categories tied
TL;DR — Key differences
- AAlpha 7R VI has higher Resolution (66.8 MP vs 12.1 MP)
- BFX3 has higher ISO max (native) (102,400 vs 32,000)
- AAlpha 7R VI has higher Burst (electronic) (30 fps vs 10 fps)
- BFX3 has lower ISO min (native) (80 vs 100)
- AAlpha 7R VI has higher RAW buffer depth (150 frames vs 120 frames)
Key specs at a glance
Size and weight, to scale
Alpha 7R VI
133 × 97 × 83 mm
713 g (1.57 lb / 25.15 oz)
FX3
130 × 78 × 85 mm
715 g (1.58 lb / 25.22 oz)
Alpha 7R VI is 2mm thinner than FX3 but it is also 3mm wider and 19mm taller.
Alpha 7R VI is 2 g lighter than FX3.
Depth (front-to-back): 83mm Alpha 7R VI · 85mm FX3
Back view, to scale
Width × Height — same proportions as the front of the body.
Alpha 7R VI
133 × 97 mm
FX3
130 × 78 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Alpha 7R VI
133 × 83 mm
FX3
130 × 85 mm
Sensor size, to scale
Alpha 7R VI
35.9 × 24 mm · Full Frame
862 mm² area
FX3
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
Alpha 7R VI
✓ more lensesSony E
350+
native lenses available
FX3
✓ 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 VI
Dimensions (W×H×D mm)
Adds 132.7, 96.9, 82.9
Resolution
66.8 MP vs 12.1 MP — higher is better
Subject recognition
Adds Bird, Eye, Insect…
Burst (electronic)
30 fps vs 10 fps — higher is better
Card types
Adds SDXC UHS-II
RAW buffer depth
150 frames vs 120 frames — higher is better
AF points / zones
759 vs 627 — higher is better
Battery life (CIPA)
600 shots vs 580 shots — higher is better
Reasons to choose
FX3
Dimensions (W×H×D mm)
Adds 129.7, 77.8, 84.5
ISO max (native)
102,400 vs 32,000 — higher is better
AA filter
Only FX3 supports it
Internal RAW video
Only FX3 supports it
Weather sealing
Only FX3 supports it
Card types
Adds SD UHS-II
ISO min (native)
80 vs 100 — lower is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓4K max frame rate — Both 120 fps
- ✓Max video bit rate — Both 600 Mbps
- ✓In-body stabilization — Both support in-body stabilization
- ✓Card slots — Both 2
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 7R VI
Pros
- ✓66.8MP fully-stacked Exmor RS sensor
- ✓30fps blackout-free electronic burst
- ✓8K 30p and 4K 120p video
- ✓8.5-stop in-body stabilization
- ✓9.44M-dot HDR OLED EVF
Cons
- –Very expensive
- –Large files demand fast cards and storage
- –8K workflow can be heavy
FX3
Pros
- ✓Cinema form factor
- ✓S-Log3 / S-Cinetone
- ✓Compact for gimbals
- ✓Full-frame sensor
Cons
- –No EVF
- –Still photo ergonomics limited
- –Single card slot
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, Alpha 7R VI or FX3?
Alpha 7R VI scores 8.5/10 versus 6.5/10 for FX3 — 66.8MP — excellent for large prints and crops.
What's the resolution difference between the Alpha 7R VI and FX3?
Alpha 7R VI is 66.8 MP and FX3 is 12.1 MP, so the Alpha 7R VI captures more detail for cropping and large prints.
Do the Alpha 7R VI and FX3 have in-body image stabilization?
Alpha 7R VI has in-body image stabilization, while fX3 has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the Alpha 7R VI or the FX3?
Alpha 7R VI reaches 30 fps electronic. FX3 reaches 10 fps electronic.
What's the weight difference between the Alpha 7R VI and FX3?
Alpha 7R VI weighs 713 g and FX3 weighs 715 g, so the Alpha 7R VI is 2 g lighter.
Do the Alpha 7R VI and FX3 record 4K video?
Alpha 7R VI: 8K (max), 4K up to 120p. FX3: 4K up to 120p.
Are the Alpha 7R VI and FX3 weather sealed?
Alpha 7R VI: No. FX3: Yes.
Which has better battery life?
Rated battery life is 600 shots (CIPA) for the Alpha 7R VI and 580 shots for the FX3, giving the Alpha 7R VI the edge.
How much does each cost?
Alpha 7R VI launched at $4,499 and FX3 at $3,899. The FX3 is $600 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Sony press materials.