Sigma
sd Quattro
Foveon APS-C body delivering exceptional per-pixel detail for stills purists.
$999
Released Feb 2016
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
Alpha 7R VI is 10.3 years newer.
Wins
sd Quattro
Wins
Alpha 7R VI
2 categories tied
TL;DR — Key differences
- BAlpha 7R VI has higher AF points / zones (759 vs 49)
- BAlpha 7R VI has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 7R VI has higher EVF resolution (9,437,184 vs 2,360,000)
- BAlpha 7R VI has higher RAW buffer depth (150 frames vs 60 frames)
- BAlpha 7R VI has higher Resolution (66.8 MP vs 29.5 MP)
Key specs at a glance
Size and weight, to scale
sd Quattro
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
Alpha 7R VI
133 × 97 × 83 mm
713 g (1.57 lb / 25.15 oz)
sd Quattro is 5mm wider, 1mm taller, and 5mm thicker than Alpha 7R VI.
sd Quattro is 193 g lighter than Alpha 7R VI.
Depth (front-to-back): 88mm sd Quattro · 83mm Alpha 7R VI
Back view, to scale
Width × Height — same proportions as the front of the body.
sd Quattro
138 × 98 mm
Alpha 7R VI
133 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
sd Quattro
138 × 88 mm
Alpha 7R VI
133 × 83 mm
Sensor size, to scale
sd Quattro
23.5 × 15.6 mm · APS-C
367 mm² area
Alpha 7R VI
35.9 × 24 mm · Full Frame
862 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
sd Quattro: mount data unavailable
Alpha 7R VI
✓ 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
sd Quattro
Dimensions (W×H×D mm)
Adds 138, 98, 88
Card types
Adds SD UHS-II
Pre-Capture / Pre-Release
Only sd Quattro supports it
Weather sealing
Only sd Quattro supports it
Weight
520 g vs 713 g — lower is better
Battery life (CIPA)
640 shots vs 600 shots — higher is better
Reasons to choose
Alpha 7R VI
AF low-light limit
-6 EV vs -5 EV — lower is better
Dimensions (W×H×D mm)
Adds 132.7, 96.9, 82.9
Card types
Adds CFexpress Type A, SDXC UHS-II
AF points / zones
759 vs 49 — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
EVF resolution
9,437,184 vs 2,360,000 — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓In-body stabilization — Both support in-body stabilization
- ✓Card slots — Both 2
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
sd Quattro
Pros
- ✓Unique Foveon color
- ✓High acutance
- ✓Distinct rendering
Cons
- –Slow
- –Poor high ISO
- –SA mount limited
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
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for travel, sd Quattro or Alpha 7R VI?
sd Quattro scores 8.5/10 versus 5.0/10 for Alpha 7R VI — 520g — compact and travel-friendly.
What's the resolution difference between the sd Quattro and Alpha 7R VI?
sd Quattro is 29.5 MP and Alpha 7R VI is 66.8 MP, so the Alpha 7R VI captures more detail for cropping and large prints.
Do the sd Quattro and Alpha 7R VI have in-body image stabilization?
sd Quattro has 6-stop in-body image stabilization, while alpha 7R VI has in-body image stabilization.
Which shoots faster bursts — the sd Quattro or the Alpha 7R VI?
sd Quattro reaches 15 fps electronic. Alpha 7R VI reaches 30 fps electronic.
What's the weight difference between the sd Quattro and Alpha 7R VI?
sd Quattro weighs 520 g and Alpha 7R VI weighs 713 g, so the sd Quattro is 193 g lighter.
Do the sd Quattro and Alpha 7R VI record 4K video?
sd Quattro: 4K up to 60p. Alpha 7R VI: 8K (max), 4K up to 120p.
Are the sd Quattro and Alpha 7R VI weather sealed?
sd Quattro: Yes. Alpha 7R VI: No.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the sd Quattro and 600 shots for the Alpha 7R VI, giving the sd Quattro the edge.
How much does each cost?
sd Quattro launched at $999 and Alpha 7R VI at $4,499. The sd Quattro is $3,500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Sigma and Sony press materials.