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A5100 vs RX1R II

Quick take: The RX1R II has the highest resolution at 42MP; the A5100 is the most affordable.

16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras

How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.

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Verdictwhich should you buy?

A5100 — Casual & Travel: The A5100 is one of the smallest APS-C mirrorless cameras ever made. Its 24MP sensor, phase-detect AF, and selfie-friendly flip screen pack remarkable capability into a shirt-pocket-sized body. No EVF or hot shoe limits it for serious use, but as a compact travel camera or beginner's first mirrorless, it punches well above its price on the used market.

Who should buy what
A5100 (2014)
is the right camera for you if…
  • Beginners stepping up from a smartphone
  • Compact travel photographers
  • Casual vloggers who want APS-C quality
Full specificationsthe better value in each row is highlighted
Specification A5100Sony · 2014RX1R IISony · 2015
Price £102 usedBest£623 used
Sensor 24.3MP APS-C Exmor CMOS42.4MP full-frame CMOS
Resolution 24.3MP42.4MPBest
Video 1080p/60pFull HD 1080p/60 (XAVC S)
Autofocus Hybrid phase-detect / contrast-detect AF, face detection399-point phase-detect + 25-point contrast hybrid AF, Eye AF
Stabilisation No stabilisationOptical SteadyShot (in the lens), no IBIS
Burst Rate 6fpsBest5fps (2.5fps with AF-S per frame)
Battery Life ~400 shots (CIPA)Best~220 shots (CIPA)
Weight 224g (body only)Best507g (with battery and card)
Dimensions 109.6 × 62.8 × 35.7mm113.3 × 65.4 × 72mm
Weather Sealed Not weather sealedNot weather sealed
Viewfinder No viewfinderPop-up OLED EVF, 2.36M dots
Screen 3.0" flip-up touchscreen, 921k dots3.0" LCD, 1.23M dots, tilts 109° up / 41° down
Mount Sony E-mountFixed Zeiss Sonnar T* 35mm f/2
Memory Cards Single SD / MemoryStick PRO Duo slotSingle SD / Memory Stick slot
Connectivity Micro USB, Wi-Fi, NFCMulti / micro USB, micro HDMI, 3.5mm mic, Multi Interface Shoe, Wi-Fi, NFC

Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.

How they score by genreengine base scores out of 10
Genre
A5100
RX1R II
Portrait
5.4/10
5.5/10
Street
7.0/10
7.4/10
Travel
6.4/10
5.7/10
Wedding & Events
3.5/10
4.8/10
Vlogging & Video
4.7/10
—
Documentary
4.1/10
4.4/10
Sports & Action
4.7/10
—
Landscape
5.0/10
5.0/10
Wildlife
5.5/10
—
Casual
5.2/10
3.9/10
Food
5.9/10
5.7/10
Macro
5.2/10
4.2/10
Architecture
5.2/10
5.2/10
Astrophotography
4.7/10
4.6/10
Fun & simple
4.9/10
—

Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →

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