Canon
EOS R1
Flagship 24.2MP full-frame BSI stacked RF body with 40fps burst, Dual Pixel Intelligent AF, 6K RAW, and 9.44M-dot EVF.
$6,299
Launch priceReleased Jul 2024
Pentax
645Z
51MP medium format DSLR that made digital MF accessible — still prized for landscape and studio.
$8,499
Launch priceReleased Apr 2014
EOS R1 is 10.3 years newer.
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Wins
EOS R1
Wins
645Z
2 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R1 has higher AF points / zones (1053 vs 101)
- AEOS R1 has higher ISO max (native) (102,400 vs 25,600)
- AEOS R1 has higher EVF resolution (9,440,000 vs 3,690,000)
- B645Z has higher Resolution (51.4 MP vs 24.2 MP)
- AEOS R1 has higher Battery life (CIPA) (1330 shots vs 640 shots)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R1
158 × 150 × 87 mm
920 g (2.03 lb / 32.45 oz)
Credit card
85.6 × 54 mm
for scale
645Z
156 × 117 × 123 mm
1470 g (3.24 lb / 51.85 oz)
EOS R1 is 36mm thinner than 645Z but it is also 2mm wider and 33mm taller.
EOS R1 is 550 g lighter than 645Z.
Depth (front-to-back): 87mm EOS R1 · 123mm 645Z
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R1
158 × 150 mm
Credit card
85.6 × 54 mm
645Z
156 × 117 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R1
158 × 87 mm
Credit card
85.6 × 54 mm
645Z
156 × 123 mm
Sensor size, to scale
EOS R1
36 × 24 mm · Full Frame
864 mm² area
645Z
43.8 × 32.8 mm · Medium Format
1437 mm² area
1.7× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R1
✓ more lensesCanon RF
105+
native lenses available
645Z: 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 R1
AF low-light limit
-7.5 EV vs -3 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
Card types
Adds CFexpress Type B, CFexpress Type B
AF points / zones
1053 vs 101 — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
EVF resolution
9,440,000 vs 3,690,000 — higher is better
Codecs
Adds RAW, XF-HEVC S, XF-AVC S
Reasons to choose
645Z
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 156, 117, 123
Card types
Adds SD UHS-II
Resolution
51.4 MP vs 24.2 MP — higher is better
ISO min (native)
64 vs 100 — lower is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓AF frame coverage — 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)
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R1
Pros
- ✓40fps electronic burst
- ✓24.2MP BSI stacked full-frame sensor
- ✓Dual Pixel Intelligent AF
- ✓6K RAW and 4K 120p video
- ✓Dual CFexpress Type B slots
Cons
- –24MP resolution
- –Very expensive
- –Large integrated-grip body
645Z
Pros
- ✓51MP medium format
- ✓CMOS sensor
- ✓Pentax color
- ✓Relatively affordable MF
Cons
- –Huge body
- –Slow operation
- –Limited lens line vs Hasselblad
Decided which one is right for you?
Compare live prices for the EOS R1 and 645Z at major authorized retailers.
Canon EOS R1
Pentax 645Z
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R1 or 645Z?
EOS R1 scores 10.0/10 versus 6.5/10 for 645Z — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R1 and 645Z?
EOS R1 is 24.2 MP and 645Z is 51.4 MP, so the 645Z captures more detail for cropping and large prints.
Do the EOS R1 and 645Z have in-body image stabilization?
EOS R1 has 8.5-stop in-body image stabilization, while 645Z has 7-stop in-body image stabilization.
Which shoots faster bursts — the EOS R1 or the 645Z?
EOS R1 reaches 40 fps electronic. 645Z reaches 20 fps electronic.
What's the weight difference between the EOS R1 and 645Z?
EOS R1 weighs 920 g and 645Z weighs 1470 g, so the EOS R1 is 550 g lighter.
Do the EOS R1 and 645Z record 4K video?
EOS R1: 6K RAW (max), 4K up to 120p. 645Z: 4K up to 60p.
Are the EOS R1 and 645Z weather sealed?
EOS R1: Yes. 645Z: Yes.
Which has better battery life?
Rated battery life is 1,330 shots (CIPA) for the EOS R1 and 640 shots for the 645Z, giving the EOS R1 the edge.
How much does each cost?
EOS R1 launched at $6,299 and 645Z at $8,499. The EOS R1 is $2,200 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R1 vs 645Z vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon and Pentax press materials.