Pentax
645Z
51MP medium format DSLR that made digital MF accessible — still prized for landscape and studio.
$8,499
Launch priceReleased Apr 2014
Pentax
KF
Updated K-70 with modern connectivity and the same rugged Pentax philosophy.
$849
Launch priceReleased Nov 2022
KF is 8.5 years newer.
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Wins
645Z
Wins
KF
10 categories tied
Which would you choose?
TL;DR — Key differences
- BKF has lower Weight (520 g vs 1470 g)
- A645Z has higher Resolution (51.4 MP vs 24.2 MP)
- A645Z has higher RAW buffer depth (120 frames vs 60 frames)
- A645Z has higher EVF resolution (3,690,000 vs 2,360,000)
- A645Z has lower ISO min (native) (64 vs 100)
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
KF
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
645Z is 18mm wider, 19mm taller, and 35mm thicker than KF.
645Z is 950 g heavier than KF.
Depth (front-to-back): 123mm 645Z · 88mm KF
Sensor size, to scale
645Z
43.8 × 32.8 mm · Medium Format
1437 mm² area
KF
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
KF
✓ 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
Resolution
51.4 MP vs 24.2 MP — higher is better
AA filter
Only 645Z supports it
RAW buffer depth
120 frames vs 60 frames — higher is better
EVF resolution
3,690,000 vs 2,360,000 — higher is better
ISO min (native)
64 vs 100 — lower is better
Burst (mechanical)
8 fps vs 6 fps — higher is better
Burst (electronic)
20 fps vs 15 fps — higher is better
Reasons to choose
KF
Dimensions (W×H×D mm)
Adds 138, 98, 88
Weight
520 g vs 1470 g — lower is better
Both cameras share
- ✓ISO max (native) — Both 25,600
- ✓AF points / zones — Both 101
- ✓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
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
KF
Pros
- ✓Weather sealed
- ✓IBIS
- ✓Affordable DSLR
Cons
- –DSLR platform
- –No 4K
- –Niche ecosystem
Decided which one is right for you?
Compare live prices for the 645Z and KF at major authorized retailers.
Pentax 645Z
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, 645Z or KF?
645Z scores 8.0/10 versus 5.0/10 for KF — 51.4MP — massive detail for large prints.
What's the resolution difference between the 645Z and KF?
645Z is 51.4 MP and KF is 24.2 MP, so the 645Z captures more detail for cropping and large prints.
Do the 645Z and KF have in-body image stabilization?
645Z has 7-stop in-body image stabilization, while KF has 6-stop in-body image stabilization.
Which shoots faster bursts — the 645Z or the KF?
645Z reaches 20 fps electronic. KF reaches 15 fps electronic.
What's the weight difference between the 645Z and KF?
645Z weighs 1470 g and KF weighs 520 g, so the KF is 950 g lighter.
Do the 645Z and KF record 4K video?
645Z: 4K up to 60p. KF: 4K up to 60p.
Are the 645Z and KF weather sealed?
645Z: Yes. KF: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the 645Z and 640 shots for the KF, giving the KF the edge.
How much does each cost?
645Z launched at $8,499 and KF at $849. The KF is $7,650 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way 645Z vs KF vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.