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Sony a7 IVvsFujifilm X100VI: Which Camera to Buy

Both are modern mirrorless cameras with in-body stabilization, 10-bit log video and the same 3.69M-dot viewfinder. The choice comes down to a mount versus a fixed lens, and to full-frame video that crops versus an APS-C sensor that fits in a jacket pocket.

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Intro

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Best for

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Biggest differences

  • Native ISO maximum

    Sony a7 IV leads

    4×

    higher is better

    • Sony a7 IV51,200 ISO
    • Fujifilm X100VI12,800 ISO

  • Memory card slots

    Sony a7 IV leads

    2×

    higher is better

    • Sony a7 IV2 slots
    • Fujifilm X100VI1 slots

  • Battery life

    Sony a7 IV leads

    +81%

    higher is better

    • Sony a7 IV580 shots
    • Fujifilm X100VI320 shots

  • Max mechanical shutter speed

    Sony a7 IV leads

    2×

    higher is better

    • Sony a7 IV8,000 1/s
    • Fujifilm X100VI4,000 1/s

Features not all of them have

Headphone port

  • Sony a7 IV✓
  • Fujifilm X100VI✕

Where each one wins

  • Sony a7 IV

    • Sensor format
    • Native ISO maximum
    • Max mechanical shutter speed
    • 4K max frame rate
    • Viewfinder magnification
    • Screen articulation
    • Battery life
    • Memory card slots
    • Weather sealing
    • Headphone port
    • HDMI port type

  • Fujifilm X100VI

    • Effective pixels
    • In-body image stabilization
    • Continuous shooting (mechanical)
    • Continuous shooting (electronic)
    • Max video resolution
    • Screen size
    • Rear screen resolution
    • Weight
    • Width
    • Height
    • Depth

What both have

  • Sensor typeCMOS
  • Video codecsH.264, HEVC
  • Video bit depth10 bit
  • Log profile support✓
  • Viewfinder resolution3.69 M dots
  • USB charging & power delivery✓
  • Minimum operating temperature0 °C

Every spec

Red marks the better value in each row.

SpecSony a7 IVFujifilm X100VI
Overview

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Overview specs

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Release date2021-10Not published
Launch price2,499.99 USDNot published
Lens mountSony EFixed lens
High resolution pixel-shift modeNo—
Sensor & Image

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Sensor & Image specs

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Effective pixels33 MP40.2 MP
Sensor formatFull-frameAPS-C
Native ISO maximum51,200 ISO112,800 ISO
In-body image stabilization5.5 stops26 stops3
Sensor readout speedNot publishedNot published
Sensor typeCMOSCMOS
Aspect ratios3:23:2, 4:3, 1:1, 16:9
Lens & Autofocus

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Lens & Autofocus specs

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Continuous shooting (mechanical)10 fps411 fps
Continuous shooting (electronic)10 fps13 fps
Max mechanical shutter speed8,000 1/s4,000 1/s
Pre-burst capture durationNot published0 s5
AF subject detectionHuman, animal, birdHuman, animal, bird, car, train, airplane, motorcycle
Video

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Video specs

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Max video resolution4K6K
4K max frame rate60 fps659.94 fps
Video codecsH.264, HEVCH.264, HEVC
4K max frame rate (full width)30 fps7—
Raw video recordingNone8—
Video bit depth10 bit10 bit
Log profile supportYesYes
Video dynamic range (log)15 stops9Not published
Viewfinder & Screen

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Viewfinder & Screen specs

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Viewfinder resolution3.69 M dots3.69 M dots
Viewfinder magnification0.78 x0.66 x
Screen size2.95 in103 in
Screen articulationFully articulatedTilting
Rear screen resolution1.04 M dots111.62 M dots
Handling & Power

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Handling & Power specs

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Battery life580 shots12320 shots
Memory card slots2 slots1 slots
Weather sealingDust and drip resistant13None14
Weight658 g521 g
Width131.3 mm128 mm
Height96.4 mm74.8 mm
Depth69.7 mm1555.3 mm
USB charging & power deliveryYes16Yes
Minimum operating temperature0 °C0 °C
Headphone portYesNo
HDMI port typeFull-sizeMicro
Notes on 16 values — test conditions and caveats
  1. 1Sony a7 IV, Native ISO maximum: Native range tops out at ISO 51200; 50-204800 requires expanded ISO settings.
  2. 2Sony a7 IV, In-body image stabilization: CIPA rating measured with the 50mm F1.4 ZA test lens attached.
  3. 3Fujifilm X100VI, In-body image stabilization: 6.0 stops of shake compensation is achieved when using the LCD or EVF.
  4. 4Sony a7 IV, Continuous shooting (mechanical): 10 fps applies to compressed RAW/JPEG/HEIF; drops to 6 fps for lossless or uncompressed RAW.
  5. 5Fujifilm X100VI, Pre-burst capture duration: Pre-shot buffers frames while the shutter is half-pressed (e.g., 20 frames at 20fps = 1 second), not a fixed seconds setting.
  6. 6Sony a7 IV, 4K max frame rate: 4K 60p is only available in Super35mm crop; full-frame 4K tops out at 30p.
  7. 7Sony a7 IV, 4K max frame rate (full width): 4K 60p requires the Super35mm crop; full-width 4K is limited to 30p.
  8. 8Sony a7 IV, Raw video recording: No internal or external raw recording; HDMI output tops out at 10-bit 4:2:2.
  9. 9Sony a7 IV, Video dynamic range (log): Sony's claim for S-Log3 per internal tests; stated as 15+ stops.
  10. 10Sony a7 IV, Screen size: Sony rates the panel at 2.95in (3.0-type); most sources round to 3in.
  11. 11Sony a7 IV, Rear screen resolution: 1,036,800 dots; Sony's retail pages round this to 1.03 megadots.
  12. 12Sony a7 IV, Battery life: 580 shots per charge with the rear LCD; 520 with the EVF.
  13. 13Sony a7 IV, Weather sealing: Dust and moisture resistant but not IP-rated; Sony does not guarantee 100% sealing.
  14. 14Fujifilm X100VI, Weather sealing: The camera body itself isn't weather-sealed; weather resistance requires the optional AR-X100 adapter ring and PRF-49 filter.
  15. 15Sony a7 IV, Depth: Sony lists 79.8mm total depth; 69.7mm is measured from front grip to rear monitor.
  16. 16Sony a7 IV, USB charging & power delivery: Charging and USB power delivery work only through the USB Type-C port.

Which is better for video?

The X100VI shoots 6K and the Sony a7 IV tops out at 4K, but the Sony's headline 4K 60p only arrives in a Super35mm crop; full-frame 4K stops at 30p. Fujifilm keeps more resolution but with one fixed lens and no headphone jack, so monitoring audio means workarounds.

The Sony gives you a full-size HDMI port and a headphone port, which matters the moment you run an external recorder or a shotgun mic. Neither records raw video, so this is a codec-and-ergonomics fight, not a sensor-headroom one.

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Which is better for video?

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Sensor and low light

Full-frame is the Sony's biggest structural advantage: the sensor is physically larger, so at the same framing it gathers more light. That shows up in its native ceiling of ISO 51,200 against 12,800 on the X100VI, and in cleaner files when venues are dim.

The X100VI counters with 40.2 MP against 33 MP, which is real extra room for cropping and large prints. If your light is decent, that resolution is the more useful number; if it isn't, the Sony's low-light latitude usually wins the shot.

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Sensor and low light

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Lens, autofocus and speed

The Sony takes E-mount lenses, which means you choose the glass for the job and can change your mind later. The X100VI's lens is permanent, and its subject detection tracks cars, trains, airplanes and motorcycles on top of people and animals, where the Sony covers people, animals and birds.

Burst speed goes to Fujifilm at 11 fps mechanical and 13 fps electronic against the Sony's 10 fps in both, and the Sony drops to 6 fps for lossless or uncompressed RAW. Fujifilm also offers more aspect ratios in camera, including 1:1.

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Lens, autofocus and speed

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Battery, cards and size

The Sony runs roughly 580 shots per charge and has two card slots, which matters if you back up on the fly or shoot all day on one battery. The X100VI manages about 320 shots and one slot, so plan on carrying spares.

In return the Fujifilm is far smaller and lighter, and the gap is not marginal: its height and depth are close to two-thirds of the Sony's. It is a camera you actually bring. The Sony's rear screen is fully articulated and the Fujifilm's only tilts, so vloggers and low-angle shooters should weigh that too.

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Battery, cards and size

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Which is best for sports and wildlife?

The X100VI's detection list is longer, but the Sony's burst buffer and dual slots matter more once you're tracking action. The Sony's compressed RAW bursts hold 10 fps, and its 1/8000 s mechanical shutter is a stop faster than the Fujifilm's, which helps in bright light with fast glass.

That said, the Sony's 4K 60p crop and full-frame 30p ceiling don't affect stills. For a fixed lens at a moderate focal length, the X100VI is a street and travel camera, not a sideline one.

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Which is best for sports and wildlife?

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The Verdict

Buy the Sony a7 IV if you want interchangeable lenses, cleaner low-light files, longer battery life and two card slots. Buy the Fujifilm X100VI if you want more pixels and burst speed in a body small enough to carry every day and are happy with one lens. Neither is a strict upgrade over the other; the mount is the decision.

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Verdict

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Where to buy

FAQ

Is the Fujifilm X100VI weather sealed?

Not by itself. The body has no weather sealing; resistance requires the optional AR-X100 adapter ring and PRF-49 filter. The Sony a7 IV is dust and drip resistant without accessories, though it isn't IP-rated.

Can the Sony a7 IV record 4K at 60p?

Yes, but only in Super35mm crop. Full-width 4K is limited to 30p, which is worth knowing if you want wide 60p footage.

Does the X100VI have a headphone jack?

No. The Sony a7 IV does, along with a full-size HDMI port, which makes the Sony the easier camera for serious audio work.

How many memory card slots do these cameras have?

The Sony a7 IV has two and the X100VI has one. Two slots means you can back up as you shoot or keep shooting when one card fills.

Does either camera stabilize the sensor?

Yes, both have in-body image stabilization. Fujifilm rates the X100VI at 6 stops when using the LCD or EVF, and Sony rates the a7 IV at 5.5 stops with the 50mm F1.4 ZA test lens attached.

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FAQ

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