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Pentax

Pentax K-S1

A 2014 entry DSLR with a 20 MP sensor and no anti-aliasing filter, in-body Shake Reduction, a pentaprism viewfinder and a built-in flash, in a light 558 g body.

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New on eBay from £79 (marketplace)
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What fits the Pentax K-S1

See all 271 accessories that fit →
Battery D-LI109 410 shots per charge (CIPA) From £16.00 · Ansmann D-LI109 Battery (Pentax D-LI109) Every D-LI109 battery and charger →
Memory card
SD Single slot Cheapest at V30 / U3+: £15.99 · Lexar Professional 1066x 64GB SD
Top mode needs V30 / U3 (from its top video mode and burst rate) SD cards and speeds →
Filter size Depends on the lens. The commonest threads on Pentax K lenses: 49mm1277mm667mm458mm362mm382mm352mm272mm2 Number = lenses with that thread. Your lens's size is on its product page. All filter sizes →
Core
Released
2014
Sensor
20.12MP APS-C CMOS
Resolution
20.1 MP
Mount
Pentax KAF2 (K-mount)
Dimensions
120 × 92.5 × 69.5mm
Weight
558g (with battery)
Weather Sealed
No
Performance
Autofocus
SAFOX IX i+ phase-detect AF, 11 points (9 cross-type)
Stabilisation
Sensor-shift Shake Reduction
Burst Rate
5.4fps
Battery Life
~410 shots (CIPA)
Features
Video
Full HD 1080p/30
Viewfinder
Pentaprism, ~100%, 0.95x
Screen
3.0" fixed LCD, 921k dots
Memory Cards
Single SD slot
Connectivity
USB 2.0, micro HDMI
Detailed Specs
Sensor Format
APS-C
Viewfinder Type
Optical (SLR)
Screen Type
Fixed
Touchscreen
No
Card Slots
1
Battery Life (CIPA)
410 shots
USB Power
No USB power
Dimensions
120 × 92 × 70mm
Weight (Grams)
558g
Autofocus Type
DSLR phase detect
Subject Detection
Face
Max Burst Rate
5.4fps
In-Body Stabilisation
Yes
Maximum Native ISO
51200
Max Mechanical Shutter
1/6000
Max Video Resolution
1080p–2.7K
10-Bit Video
No
Log Profile
No
Built-in Microphone Input
No
Headphone Jack
No
HDMI Port Type
Micro

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GearScore™ — Suitability by Genre

Base score — computed from verified specs for an enthusiast shooting photo and video. Camera Match adjusts it for your skill level and priorities.

Portrait
5.7
Street
5.5
Travel
4.9
Wedding & Events
4.2
Documentary
3.7
Sports & Action
4.8
Landscape
4.2
Wildlife
5.4
Casual
3.5
Food
4.6
Macro
4.4
Architecture
4.4
Astrophotography
4.2
✅ Great For
🧑
Portrait 5.7 Strong on viewfinder and lens reach / ecosystem.
⚠️ Not Ideal For
📷
Casual 3.5 Held back by ease of use and generation.
🎥
Documentary 3.7 Held back by audio and generation.
🌌
Astrophotography 4.2 Held back by astro aids and generation.
📝 How suitability scores are calculated GearScore™ genre scores are calculated from this camera's verified specifications — autofocus, sensor, weight, weather sealing and more — weighted by what matters for each type of photography. Where a spec sheet misses something (e.g. a manual-focus rangefinder for street), we apply a documented editorial adjustment. Scores are not based on customer reviews. See our full methodology →
Price History — K-S1
New prices, last 30 days
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Series history
Pentax K Series
Pentax's weather-sealed APS-C DSLRs — built for the outdoors.
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