Sony RX100 III vs RX100 IV: Which Compact Wins?
By The Camera Gear Shop | Published: 2026-10-30
Category: Comparisons
Compare the Sony RX100 III and RX100 IV on sensor design, video quality, and speed to decide which premium compact fits your needs.
Quick answer
Choose the Sony RX100 IV if you shoot 4K video or need faster burst speeds; pick the RX100 III if you want a capable compact at a lower price and don't need 4K.
Sensor and image quality: similar resolution, different technology
Both cameras pack a 20.1-megapixel 1-inch sensor, so stills look comparable in good light. The RX100 III uses a backside-illuminated Exmor R CMOS sensor, while the RX100 IV upgrades to a stacked backside-illuminated Exmor RS CMOS sensor. The stacked design in the IV enables faster readout, which matters for video and burst shooting, but in everyday photography you may not notice a difference.
Video: 4K is the big divider
The RX100 III records full HD video, which is fine for casual clips. The RX100 IV adds 4K recording, making it a better fit if you want future-proof footage or plan to crop in post. If you rarely shoot video, the III's 1080p output is still perfectly usable.
Trade-offs to consider
- Budget vs 4K: The RX100 III costs less than the RX100 IV. If you don't need 4K, the III saves money without sacrificing stills quality. Set your budget first—4K is the main reason to pay more.
- Video needs: Choose the RX100 IV if you shoot 4K video or want more flexibility in post. The III's full HD is fine for casual use. List your video requirements before buying.
- Speed and responsiveness: The RX100 IV's stacked sensor enables faster readout, which can improve burst shooting and reduce rolling shutter in video. The III is still capable for most stills. If you shoot fast action, the IV's speed advantage matters.
Product facts
- Sony Cyber-shot DSC-RX100 III: The Sony Cyber-shot DSC-RX100 III features a 20.1MP 1-inch Exmor R CMOS sensor and full HD video recording. It delivers strong image quality in a pocketable body, making it a solid choice for everyday photography without the 4K premium.
Sony Cyber-shot DSC-RX100 III - Sony Cyber-shot DSC-RX100 IV: The Sony Cyber-shot DSC-RX100 IV uses a stacked 20.1MP 1-inch Exmor RS CMOS sensor and records 4K video. The stacked sensor enables faster data readout, which supports 4K capture and higher-speed shooting for action and video-focused users.
Sony Cyber-shot DSC-RX100 IV
Which one fits you?
Best for
- Photographers who want a premium compact for stills and occasional full HD video on a budget
- Travelers who prioritize pocketability and image quality over 4K recording
Not for
- Videographers who need 4K capture in a compact camera—choose the RX100 IV instead
- Action shooters who rely on high-speed burst modes—the IV's stacked sensor offers better performance
