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Nikon D5500 vs Pentax K-S2

Every published spec side by side, with today's lowest prices for the market you've chosen.

Key differences

  • Announced: Feb 2015 on the K-S2, against Jan 2015 on the D5500.
  • Resolution: 24.2 MP on the D5500, against 20.1 MP on the K-S2.
  • Native ISO: 100–51,200 on the K-S2, against 100–25,600 on the D5500.
  • In-body stabilisation: Yes, 3.5 stops on the K-S2, against No on the D5500.
  • Burst (mechanical): 5.5 fps on the K-S2, against 5 fps on the D5500.
  • Fastest shutter (mech.): 1/6,000s on the K-S2, against 1/4,000s on the D5500.
Nikon D5500
Nikon D5500
Pentax K-S2
Pentax K-S2
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Overview
TypeDSLRDSLR
AnnouncedJan 2015Feb 2015 (best)
US launch priceUS list price when announced, body only. Today's prices are in the offers table.$899.95—
LensInterchangeableInterchangeable
Sensor & image
Sensor sizeAPS-CAPS-C
Sensor typeCMOSCMOS
Resolution24.2 MP (best)20.1 MP
Native ISO100–25,600100–51,200 (best)
In-body stabilisationNoYes, 3.5 stops (best)
Speed & autofocus
Burst (mechanical)5 fps5.5 fps (best)
Burst (electronic)——
Fastest shutter (mech.)1/4,000s1/6,000s (best)
Fastest shutter (elec.)——
AF pointsMakers count points differently, so this is not ranked.3911
Subject detectionMakers group subjects differently (Canon's "animal" includes birds), so only having it is ranked.Human—
Video
Max resolution1080p1080p
4K frame rate——
10-bit internalNoNo
Internal raw videoNoNo
Mic inputYes (best)No
Headphone jackNoNo
Viewfinder & screen
ViewfinderOpticalOptical
Rear screen3.2", 1.04M dots (best)3", 0.92M dots
Screen articulationFully articulatingFully articulating
TouchscreenYes (best)No
Body & battery
Weight (with battery)470 g (best)678 g
Dimensions (W×H×D)124 × 97 × 70 mm122.5 × 91 × 72.5 mm
Weather sealedNoYes (best)
Battery (CIPA shots)——
Card slots1 · SD UHS-I1 · SD
USB-CNoNo
Built-in flashYesYes
Wi-Fi / BluetoothWi-FiWi-Fi

Green marks the better figure where “better” is unambiguous. A dash means the maker doesn't publish it or we haven't verified it yet.

Low light & noise

D5500

3.9 µm pixels

24.2 MP on a aps-c sensor, ISO up to 25,600

K-S2

4.3 µm pixels

20.12 MP on a aps-c sensor, ISO up to 51,200

Bigger pixels gather more light each, so they tend to show less noise at high ISO, but sensor design matters as much. For real noise at ISO 6400, these sites measure it:

Size, to scale

Front (width × height)

Top (width × depth)

D5500: 124 × 97 × 70 mm, 470 gK-S2: 122.5 × 91 × 72.5 mm, 678 g

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