Canon
EOS R7
32.5MP APS-C RF-mount body with 30fps burst, 4K 60p, 7-stop IBIS, and advanced subject tracking.
$1,499
Launch priceReleased May 2022
Pentax
K-3 Mark III Monochrome
Monochrome-only APS-C DSLR with 25.7MP sensor, IBIS, optical viewfinder, and weather sealing.
$2,199
Launch priceReleased Apr 2024
K-3 Mark III Monochrome is 1.9 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
EOS R7
Wins
K-3 Mark III Monochrome
5 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R7 has higher AF points / zones (651 vs 101)
- BK-3 Mark III Monochrome has higher RAW buffer depth (120 frames vs 42 frames)
- AEOS R7 has higher Max video bit rate (340 Mbps vs 150 Mbps)
- AEOS R7 has higher Burst (mechanical) (15 fps vs 8 fps)
- BK-3 Mark III Monochrome has higher EVF resolution (3,690,000 vs 2,360,000)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareEOS R7
132 × 90 × 92 mm
612 g (1.35 lb / 21.59 oz)
Credit card
85.6 × 54 mm
for scale
K-3 Mark III Monochrome
135 × 104 × 74 mm
820 g (1.81 lb / 28.92 oz)
EOS R7 is 3mm narrower and 13mm shorter than K-3 Mark III Monochrome but it is also 18mm thicker.
EOS R7 is 208 g lighter than K-3 Mark III Monochrome.
Depth (front-to-back): 92mm EOS R7 · 74mm K-3 Mark III Monochrome
Sensor size, to scale
EOS R7
22.3 × 14.8 mm · APS-C
330 mm² area
K-3 Mark III Monochrome
23.5 × 15.6 mm · APS-C
367 mm² area
1.1× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R7
✓ more lensesCanon RF
105+
native lenses available
K-3 Mark III Monochrome
Pentax K
70+
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
EOS R7
AF low-light limit
-5 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 132, 90.4, 91.7
AF points / zones
651 vs 101 — higher is better
Max video bit rate
340 Mbps vs 150 Mbps — higher is better
AA filter
Only EOS R7 supports it
Burst (mechanical)
15 fps vs 8 fps — higher is better
Burst (electronic)
30 fps vs 20 fps — higher is better
EVF magnification
1.15 × vs 0.78 × — higher is better
Reasons to choose
K-3 Mark III Monochrome
Dimensions (W×H×D mm)
Adds 134.5, 103.5, 73.5
RAW buffer depth
120 frames vs 42 frames — higher is better
EVF resolution
3,690,000 vs 2,360,000 — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓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
- ✓4K max frame rate — Both 60 fps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R7
Pros
- ✓High-resolution 32.5MP APS-C sensor
- ✓Up to 30fps electronic burst
- ✓7-stop in-body stabilization
- ✓Dual SD UHS-II card slots
- ✓Strong value for wildlife and sports reach
Cons
- –APS-C sensor trails full-frame in low-light depth
- –RF-S lens lineup is still limited
- –4K 60p uses a crop in some modes
K-3 Mark III Monochrome
Pros
- ✓Dedicated monochrome sensor
- ✓Optical viewfinder
- ✓IBIS in a DSLR
- ✓Weather sealed
Cons
- –Black-and-white only
- –DSLR platform
- –Limited video
Decided which one is right for you?
Compare live prices for the EOS R7 and K-3 Mark III Monochrome at major authorized retailers.
Canon EOS R7
Pentax K-3 Mark III Monochrome
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 sports, EOS R7 or K-3 Mark III Monochrome?
EOS R7 scores 10.0/10 versus 6.5/10 for K-3 Mark III Monochrome — 30fps burst — pro-level action capture.
What's the resolution difference between the EOS R7 and K-3 Mark III Monochrome?
EOS R7 is 32.5 MP and K-3 Mark III Monochrome is 25.7 MP, so the EOS R7 captures more detail for cropping and large prints.
Do the EOS R7 and K-3 Mark III Monochrome have in-body image stabilization?
EOS R7 has 8-stop in-body image stabilization, while K-3 Mark III Monochrome has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R7 or the K-3 Mark III Monochrome?
EOS R7 reaches 30 fps electronic. K-3 Mark III Monochrome reaches 20 fps electronic.
What's the weight difference between the EOS R7 and K-3 Mark III Monochrome?
EOS R7 weighs 612 g and K-3 Mark III Monochrome weighs 820 g, so the EOS R7 is 208 g lighter.
Do the EOS R7 and K-3 Mark III Monochrome record 4K video?
EOS R7: 4K up to 60p. K-3 Mark III Monochrome: 4K up to 60p.
Are the EOS R7 and K-3 Mark III Monochrome weather sealed?
EOS R7: Yes. K-3 Mark III Monochrome: Yes.
Which has better battery life?
Rated battery life is 660 shots (CIPA) for the EOS R7 and 640 shots for the K-3 Mark III Monochrome, giving the EOS R7 the edge.
How much does each cost?
EOS R7 launched at $1,499 and K-3 Mark III Monochrome at $2,199. The EOS R7 is $700 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R7 vs K-3 Mark III Monochrome vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.