Canon
EOS R3
Pro 24MP full-frame stacked-sensor body built for sports, news, wildlife, and high-speed hybrid capture.
$5,999
Released Sep 2021
Pentax
K-70
Weather-sealed APS-C DSLR with IBIS and AA filter simulator.
$649
Released Jun 2016
EOS R3 is 5.3 years newer.
Wins
EOS R3
Wins
K-70
4 categories tied
TL;DR — Key differences
- AEOS R3 has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- AEOS R3 has higher AF points / zones (1053 vs 101)
- AEOS R3 has higher ISO max (native) (102,400 vs 25,600)
- AEOS R3 has higher RAW buffer depth (150 frames vs 60 frames)
- AEOS R3 has higher EVF resolution (5,760,000 vs 2,360,000)
Key specs at a glance
Size and weight, to scale
EOS R3
150 × 143 × 87 mm
1015 g (2.24 lb / 35.80 oz)
K-70
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
EOS R3 is 1mm thinner than K-70 but it is also 12mm wider and 45mm taller.
EOS R3 is 495 g heavier than K-70.
Depth (front-to-back): 87mm EOS R3 · 88mm K-70
Sensor size, to scale
EOS R3
36 × 24 mm · Full Frame
864 mm² area
K-70
23.5 × 15.6 mm · APS-C
367 mm² area
2.4× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R3
✓ more lensesCanon RF
105+
native lenses available
K-70
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 R3
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 150, 142.6, 87.2
Max video bit rate
2600 Mbps vs 150 Mbps — higher is better
AF points / zones
1053 vs 101 — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
EVF resolution
5,760,000 vs 2,360,000 — higher is better
Reasons to choose
K-70
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 138, 98, 88
Pre-Capture / Pre-Release
Only K-70 supports it
Weight
520 g vs 1015 g — lower is better
Battery life (CIPA)
640 shots vs 620 shots — higher is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Resolution
24.2 MP vs 24.1 MP — 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
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R3
Pros
- ✓30fps electronic burst from a stacked full-frame sensor
- ✓Exceptional low-light AF down to -7.5 EV
- ✓Integrated pro body with large LP-E19 battery
- ✓6K RAW video and 4K 120p
- ✓Rugged weather-sealed construction
Cons
- –24MP resolution trails higher-detail rivals
- –Large integrated-grip body
- –Expensive compared with enthusiast full-frame bodies
K-70
Pros
- ✓Weather sealed entry
- ✓IBIS in DSLR
- ✓Unique features
Cons
- –DSLR
- –24MP dated
- –Limited video
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, EOS R3 or K-70?
K-70 scores 9.0/10 versus 5.0/10 for EOS R3 — Bird AF subject recognition.
What's the resolution difference between the EOS R3 and K-70?
EOS R3 is 24.1 MP and K-70 is 24.2 MP, so the K-70 captures more detail for cropping and large prints.
Do the EOS R3 and K-70 have in-body image stabilization?
EOS R3 has 8-stop in-body image stabilization, while k-70 has 6-stop in-body image stabilization.
Which shoots faster bursts — the EOS R3 or the K-70?
EOS R3 reaches 30 fps electronic. K-70 reaches 15 fps electronic.
What's the weight difference between the EOS R3 and K-70?
EOS R3 weighs 1015 g and K-70 weighs 520 g, so the K-70 is 495 g lighter.
Do the EOS R3 and K-70 record 4K video?
EOS R3: 6K RAW (max), 4K up to 120p. K-70: 4K up to 60p.
Are the EOS R3 and K-70 weather sealed?
EOS R3: Yes. K-70: Yes.
Which has better battery life?
Rated battery life is 620 shots (CIPA) for the EOS R3 and 640 shots for the K-70, giving the K-70 the edge.
How much does each cost?
EOS R3 launched at $5,999 and K-70 at $649. The K-70 is $5,350 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.