Pentax
645Z
51MP medium format DSLR that made digital MF accessible — still prized for landscape and studio.
$8,499
Launch priceReleased Apr 2014
Pentax
K-70
Weather-sealed APS-C DSLR with IBIS and AA filter simulator.
$649
Launch priceReleased Jun 2016
K-70 is 2.1 years newer.
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Wins
645Z
Wins
K-70
5 categories tied
Which would you choose?
TL;DR — Key differences
- A645Z has higher RAW buffer depth (120 frames vs 10 frames)
- A645Z has higher AF points / zones (101 vs 11)
- BK-70 has higher ISO max (native) (204,800 vs 25,600)
- BK-70 has lower Weight (688 g vs 1470 g)
- A645Z has higher Resolution (51.4 MP vs 24.2 MP)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share645Z
156 × 117 × 123 mm
1470 g (3.24 lb / 51.85 oz)
Credit card
85.6 × 54 mm
for scale
K-70
126 × 93 × 74 mm
688 g (1.52 lb / 24.27 oz)
645Z is 31mm wider, 24mm taller, and 49mm thicker than K-70.
645Z is 782 g heavier than K-70.
Depth (front-to-back): 123mm 645Z · 74mm K-70
Back view, to scale
Width × Height — same proportions as the front of the body.
645Z
156 × 117 mm
Credit card
85.6 × 54 mm
K-70
126 × 93 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
645Z
156 × 123 mm
Credit card
85.6 × 54 mm
K-70
126 × 74 mm
Sensor size, to scale
645Z
43.8 × 32.8 mm · Medium Format
1437 mm² area
K-70
23.5 × 15.6 mm · APS-C
367 mm² area
3.9× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
645Z: mount data unavailable
K-70
✓ more lensesPentax 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
645Z
Dimensions (W×H×D mm)
Adds 156, 117, 123
Card types
Adds SD UHS-II
RAW buffer depth
120 frames vs 10 frames — higher is better
AF points / zones
101 vs 11 — higher is better
Resolution
51.4 MP vs 24.2 MP — higher is better
AA filter
Only 645Z supports it
Codecs
Adds H.265
Card slots
2 vs 1 — higher is better
Reasons to choose
K-70
Dimensions (W×H×D mm)
Adds 125.5, 93, 74
Card types
Adds SD, SDHC, SDXC
ISO max (native)
204,800 vs 25,600 — higher is better
Weight
688 g vs 1470 g — lower is better
EVF magnification
0.95 × vs 0.78 × — higher is better
Both cameras share
- ✓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
- ✓Max video bit rate — Both 150 Mbps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
645Z
Pros
- ✓51MP medium format
- ✓CMOS sensor
- ✓Pentax color
- ✓Relatively affordable MF
Cons
- –Huge body
- –Slow operation
- –Limited lens line vs Hasselblad
K-70
Pros
- ✓Weather sealed entry
- ✓IBIS in DSLR
- ✓Unique features
Cons
- –DSLR
- –24MP dated
- –Limited video
Decided which one is right for you?
Compare live prices for the 645Z and K-70 at major authorized retailers.
Pentax 645Z
Pentax K-70
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, 645Z or K-70?
645Z scores 8.0/10 versus 4.0/10 for K-70 — 51.4MP — massive detail for large prints.
What's the resolution difference between the 645Z and K-70?
645Z is 51.4 MP and K-70 is 24.2 MP, so the 645Z captures more detail for cropping and large prints.
Do the 645Z and K-70 have in-body image stabilization?
645Z has 7-stop in-body image stabilization, while K-70 has 6-stop in-body image stabilization.
Which shoots faster bursts — the 645Z or the K-70?
645Z reaches 20 fps electronic. K-70 reaches 15 fps electronic.
What's the weight difference between the 645Z and K-70?
645Z weighs 1470 g and K-70 weighs 688 g, so the K-70 is 782 g lighter.
Do the 645Z and K-70 record 4K video?
645Z: 4K up to 60p. K-70: 4K up to 60p.
Are the 645Z and K-70 weather sealed?
645Z: Yes. K-70: Yes.
How much does each cost?
645Z launched at $8,499 and K-70 at $649. The K-70 is $7,850 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way 645Z vs K-70 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed August 2026.
Product images courtesy of Pentax press materials.