Sigma
sd1 Merrill
APS-C Foveon X3 body delivering extraordinary per-pixel detail and unique color rendering.
$2,299
Launch priceReleased Mar 2012
Sony
Alpha 7R VI
66.8MP stacked full-frame high-resolution body with 30fps bursts, 8K 30p, 4K 120p, and Sony's AI processing unit.
$4,499
Launch priceReleased Jun 2026
Alpha 7R VI is 14.3 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
sd1 Merrill
Wins
Alpha 7R VI
2 categories tied
Which would you choose?
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 Burst (electronic) (30 fps vs 15 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to sharesd1 Merrill
146 × 114 × 80 mm
680 g (1.50 lb / 23.99 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 7R VI
133 × 97 × 83 mm
713 g (1.57 lb / 25.15 oz)
sd1 Merrill is 3mm thinner than Alpha 7R VI but it is also 13mm wider and 17mm taller.
sd1 Merrill is 33 g lighter than Alpha 7R VI.
Depth (front-to-back): 80mm sd1 Merrill · 83mm Alpha 7R VI
Back view, to scale
Width × Height — same proportions as the front of the body.
sd1 Merrill
146 × 114 mm
Credit card
85.6 × 54 mm
Alpha 7R VI
133 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
sd1 Merrill
146 × 80 mm
Credit card
85.6 × 54 mm
Alpha 7R VI
133 × 83 mm
Sensor size, to scale
sd1 Merrill
23.5 × 15.7 mm · APS-C
369 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
sd1 Merrill: 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
sd1 Merrill
Dimensions (W×H×D mm)
Adds 145.5, 113.5, 80
Card types
Adds SD UHS-II
Pre-Capture / Pre-Release
Only sd1 Merrill supports it
Weather sealing
Only sd1 Merrill supports it
Battery life (CIPA)
640 shots vs 600 shots — higher is better
Weight
680 g vs 713 g — lower 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 (IBIS) — Both support in-body stabilization (ibis)
- ✓Card slots — Both 2
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
sd1 Merrill
Pros
- ✓Unique Foveon rendering
- ✓Exceptional detail
- ✓No AA filter needed
- ✓Distinct look
Cons
- –Very slow
- –Poor high ISO
- –SA mount limited
Alpha 7R VI
Pros
- ✓66.8MP stacked full-frame sensor
- ✓30fps blackout-free electronic burst
- ✓8K 30p and 4K 120p video
- ✓5-axis sensor-shift stabilization
- ✓9.44M-dot HDR OLED EVF
Cons
- –Very expensive
- –Large files demand fast cards and storage
- –8K workflow can be heavy
Decided which one is right for you?
Compare live prices for the sd1 Merrill and Alpha 7R VI at major authorized retailers.
Sigma sd1 Merrill
Sony Alpha 7R VI
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
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, sd1 Merrill or Alpha 7R VI?
sd1 Merrill scores 9.0/10 versus 6.5/10 for Alpha 7R VI — Bird AF subject recognition.
What's the resolution difference between the sd1 Merrill and Alpha 7R VI?
sd1 Merrill is 46 MP and Alpha 7R VI is 66.8 MP, so the Alpha 7R VI captures more detail for cropping and large prints.
Do the sd1 Merrill and Alpha 7R VI have in-body image stabilization?
sd1 Merrill has 6-stop in-body image stabilization, while Alpha 7R VI has in-body image stabilization.
Which shoots faster bursts — the sd1 Merrill or the Alpha 7R VI?
sd1 Merrill reaches 15 fps electronic. Alpha 7R VI reaches 30 fps electronic.
What's the weight difference between the sd1 Merrill and Alpha 7R VI?
sd1 Merrill weighs 680 g and Alpha 7R VI weighs 713 g, so the sd1 Merrill is 33 g lighter.
Do the sd1 Merrill and Alpha 7R VI record 4K video?
sd1 Merrill: 4K up to 60p. Alpha 7R VI: 8K (max), 4K up to 120p.
Are the sd1 Merrill and Alpha 7R VI weather sealed?
sd1 Merrill: Yes. Alpha 7R VI: No.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the sd1 Merrill and 600 shots for the Alpha 7R VI, giving the sd1 Merrill the edge.
How much does each cost?
sd1 Merrill launched at $2,299 and Alpha 7R VI at $4,499. The sd1 Merrill is $2,200 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way sd1 Merrill vs Alpha 7R VI vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Sigma and Sony press materials.