Fujifilm
X100V
Previous-gen fixed 23mm f/2 street camera — still hugely popular and hard to find.
$1,399
Launch priceReleased Feb 2020
Pentax
K-3 Mark III
APS-C DSLR flagship with optical viewfinder and weather sealing.
$1,999
Launch priceReleased Apr 2021
K-3 Mark III is 1.3 years newer.
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Wins
X100V
Wins
K-3 Mark III
2 categories tied
TL;DR — Key differences
- BK-3 Mark III has higher IBIS effectiveness (7 stops vs 0 stops)
- BK-3 Mark III has higher RAW buffer depth (120 frames vs 17 frames)
- AX100V has higher AF points / zones (425 vs 101)
- BK-3 Mark III has higher ISO max (native) (25,600 vs 12,800)
- BK-3 Mark III has higher 4K max frame rate (60 fps vs 30 fps)
Key specs at a glance
Size and weight, to scale
X100V
128 × 75 × 53 mm
478 g (1.05 lb / 16.86 oz)
K-3 Mark III
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
X100V is 10mm narrower, 23mm shorter, and 35mm thinner than K-3 Mark III.
X100V is 42 g lighter than K-3 Mark III.
Depth (front-to-back): 53mm X100V · 88mm K-3 Mark III
Sensor size, to scale
X100V
23.5 × 15.6 mm · APS-C
367 mm² area
K-3 Mark III
23.5 × 15.6 mm · APS-C
367 mm² area
Lens ecosystem
Native lens selection
X100V: mount data unavailable
K-3 Mark III
✓ 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
X100V
AF low-light limit
-5 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 128, 74.8, 53.3
Card types
Adds SD UHS-I
AF points / zones
425 vs 101 — higher is better
Burst (electronic)
30 fps vs 20 fps — higher is better
Burst (mechanical)
11 fps vs 8 fps — higher is better
Max video bit rate
200 Mbps vs 150 Mbps — higher is better
Weight
478 g vs 520 g — lower is better
Reasons to choose
K-3 Mark III
Subject recognition
Adds Human, Animal, Bird…
IBIS effectiveness
7 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 138, 98, 88
Card types
Adds SD UHS-II
RAW buffer depth
120 frames vs 17 frames — higher is better
ISO max (native)
25,600 vs 12,800 — higher is better
Animal / bird AF
Only K-3 Mark III supports it
4K max frame rate
60 fps vs 30 fps — higher is better
Both cameras share
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Weather sealing — Both support weather sealing
- ✓EVF resolution — Both 3,690,000
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
X100V
Pros
- ✓Classic design
- ✓Leaf shutter
- ✓Film simulations
- ✓Proven street camera
Cons
- –Superseded by X100VI
- –Fixed lens
- –No IBIS
K-3 Mark III
Pros
- ✓Optical viewfinder
- ✓Weather sealed
- ✓IBIS in DSLR
Cons
- –DSLR system declining
- –APS-C
- –Limited video
Decided which one is right for you?
Compare live prices for the X100V and K-3 Mark III at major authorized retailers.
Fujifilm X100V
Pentax K-3 Mark III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, X100V or K-3 Mark III?
K-3 Mark III scores 10.0/10 versus 6.5/10 for X100V — 20fps burst captures fleeting moments.
What's the resolution difference between the X100V and K-3 Mark III?
X100V is 26.1 MP and K-3 Mark III is 25.7 MP, so the X100V captures more detail for cropping and large prints.
Do the X100V and K-3 Mark III have in-body image stabilization?
X100V does not have IBIS, while k-3 Mark III has 7-stop in-body image stabilization.
Which shoots faster bursts — the X100V or the K-3 Mark III?
X100V reaches 30 fps electronic. K-3 Mark III reaches 20 fps electronic.
What's the weight difference between the X100V and K-3 Mark III?
X100V weighs 478 g and K-3 Mark III weighs 520 g, so the X100V is 42 g lighter.
Do the X100V and K-3 Mark III record 4K video?
X100V: 4K up to 30p. K-3 Mark III: 4K up to 60p.
Are the X100V and K-3 Mark III weather sealed?
X100V: Yes. K-3 Mark III: Yes.
Which has better battery life?
Rated battery life is 350 shots (CIPA) for the X100V and 640 shots for the K-3 Mark III, giving the K-3 Mark III the edge.
How much does each cost?
X100V launched at $1,399 and K-3 Mark III at $1,999. The X100V is $600 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.