Canon
EOS R6 Mark III
Hybrid 32.5MP full-frame RF body with 7K RAW video, 40fps electronic burst, 8.5-stop IBIS, and Dual Pixel CMOS AF II.
$2,799
Launch priceReleased Nov 2025
Sigma
sd1 Merrill
APS-C Foveon X3 body delivering extraordinary per-pixel detail and unique color rendering.
$2,299
Launch priceReleased Mar 2012
EOS R6 Mark III is 13.7 years newer.
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Wins
EOS R6 Mark III
Wins
sd1 Merrill
4 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R6 Mark III has higher AF points / zones (1053 vs 49)
- AEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 15 fps)
- AEOS R6 Mark III has higher ISO max (native) (64,000 vs 25,600)
- AEOS R6 Mark III has higher RAW buffer depth (150 frames vs 60 frames)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
Credit card
85.6 × 54 mm
for scale
sd1 Merrill
146 × 114 × 80 mm
680 g (1.50 lb / 23.99 oz)
EOS R6 Mark III is 7mm narrower and 15mm shorter than sd1 Merrill but it is also 8mm thicker.
EOS R6 Mark III is 19 g heavier than sd1 Merrill.
Depth (front-to-back): 88mm EOS R6 Mark III · 80mm sd1 Merrill
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Credit card
85.6 × 54 mm
sd1 Merrill
146 × 114 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R6 Mark III
138 × 88 mm
Credit card
85.6 × 54 mm
sd1 Merrill
146 × 80 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
sd1 Merrill
23.5 × 15.7 mm · APS-C
369 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R6 Mark III
✓ more lensesCanon RF
105+
native lenses available
sd1 Merrill: mount data unavailable
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 R6 Mark III
AF low-light limit
-6.5 EV vs -5 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
AF points / zones
1053 vs 49 — higher is better
Max video bit rate
2600 Mbps vs 150 Mbps — higher is better
Burst (electronic)
40 fps vs 15 fps — higher is better
ISO max (native)
64,000 vs 25,600 — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
Reasons to choose
sd1 Merrill
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 145.5, 113.5, 80
Resolution
46 MP vs 32.5 MP — higher is better
Weight
680 g vs 699 g — lower is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓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.
EOS R6 Mark III
Pros
- ✓32.5MP full-frame sensor
- ✓7K RAW video & 4K 120p
- ✓40fps electronic burst with Pre-Continuous
- ✓8.5-stop IBIS
Cons
- –Single CFexpress Type B + SD slot
- –Smaller LCD than R5 II
- –LP-E6P required for full features
sd1 Merrill
Pros
- ✓Unique Foveon rendering
- ✓Exceptional detail
- ✓No AA filter needed
- ✓Distinct look
Cons
- –Very slow
- –Poor high ISO
- –SA mount limited
Decided which one is right for you?
Compare live prices for the EOS R6 Mark III and sd1 Merrill at major authorized retailers.
Canon EOS R6 Mark III
Sigma sd1 Merrill
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark III or sd1 Merrill?
EOS R6 Mark III scores 10.0/10 versus 6.5/10 for sd1 Merrill — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark III and sd1 Merrill?
EOS R6 Mark III is 32.5 MP and sd1 Merrill is 46 MP, so the sd1 Merrill captures more detail for cropping and large prints.
Do the EOS R6 Mark III and sd1 Merrill have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while sd1 Merrill has 6-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the sd1 Merrill?
EOS R6 Mark III reaches 40 fps electronic. sd1 Merrill reaches 15 fps electronic.
What's the weight difference between the EOS R6 Mark III and sd1 Merrill?
EOS R6 Mark III weighs 699 g and sd1 Merrill weighs 680 g, so the sd1 Merrill is 19 g lighter.
Do the EOS R6 Mark III and sd1 Merrill record 4K video?
EOS R6 Mark III: 4K up to 120p. sd1 Merrill: 4K up to 60p.
Are the EOS R6 Mark III and sd1 Merrill weather sealed?
EOS R6 Mark III: Yes. sd1 Merrill: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 640 shots for the sd1 Merrill, giving the sd1 Merrill the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and sd1 Merrill at $2,299. The sd1 Merrill is $500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R6 Mark III vs sd1 Merrill vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon and Sigma press materials.