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Panasonic LUMIX S1IIE vs Sony Alpha 7 IV

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

PanasonicLUMIX S1IIESonyAlpha 7 IV
Overview
ReleasedJune 2025November 2021
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeCMOSExmor R back-illuminated CMOS
Sensor dimensions35.6 × 23.8 mm35.9 × 23.9 mm
Effective resolution24.2 MP33 MP
Largest image6000 × 40007008 × 4672
RAW recordingYesYes
Standard ISO range100–51200100–51200
Sensor detail24.2 million effective and 25.3 million total pixels; 35.6 × 23.8 mm CMOS; normal 3:2 stills 6000×4000, distinct from eight-frame high-resolution 12000×8000 compositesApproximately 34.1 million total pixels; 3:2 full-frame sensor
Image formatsJPEG, RAW and HEIF; HEIF HDR uses HLG, with SDR also available; high-resolution composites exclude HEIFJPEG, HEIF and 14-bit RAW; compressed, lossless compressed and uncompressed RAW options
ISO detailStandard stills ISO 100–51200; expanded ISO 50, 102400 and 204800; native stills sensitivities ISO 100/640, distinct from V-Log and other video profilesStandard still-image ISO 100–51200; expanded ISO 50–204800. Movie ISO 100–51200, expandable to 102400.
Image processor–BIONZ XR
Lens and shooting
Lens mountL-MountSony E-mount
StabilisationLens and sensor shiftSensor shift
Maximum continuous burst30 fps10 fps
Lens detailL-Mount full-frame lenses; APS-C lenses use a reduced image area, with 3984×2656 3:2 stillsInterchangeable E-mount; body figures exclude lenses. ILCE-7M4K kit includes FE 28–70mm F3.5–5.6 OSS.
AutofocusPhase Hybrid AF with up to 779 phase-detection and 315 contrast positions; humans/animals/cars/motorcycles and bicycles/trains/aircraft; −6 to 18 EV with f/1.4 lens, ISO 100, AFS. Subject selection is manual; current maker table includes Urban Sports recognitionFast Hybrid AF with 759 phase-detection and 425 contrast-detection points in full-frame mode; Eye AF recognises humans, animals and birds in stills and movies
ShutterMechanical 60–1/8000 second and Bulb to approximately 30 minutes; electronic first curtain 60–1/2000; electronic 60–1/8000 with Bulb to approximately 60 secondsMechanical or electronic shutter; 1/8000 second to 30 seconds plus Bulb; full-frame flash sync 1/250 second
Burst detailFull-resolution electronic 30 fps with AFS/AFC/MF; SH buffer 180 JPEG/RAW or 170 HEIF frames under maker conditions. Mechanical speed-priority up to 10 fps including H+ AFC, or 8 fps AFC with live view; image-priority 7 fps AFS/6 fps AFC with live view. No composite high-resolution output counted as sensor resolutionHi+ up to 10 fps, Hi 8 fps, Mid 6 fps and Lo 3 fps. Photography Blog and TechRadar report JPEG/compressed RAW are needed for 10 fps; uncompressed or lossless RAW slows to approximately 5–6 fps. Speed and buffer depend on shooting conditions and card.
Stabilisation detailFive-axis sensor-shift B.I.S., eight centre/seven corner stops with S-R2060 at 60 mm; compatible Dual I.S.2 gives seven centre/corner stops with S-R24105 at 105 mm under CIPA-2024. Electronic video IS separately available; current Japan table marks crop-less mode as firmware 3.0Five-axis sensor shift; maker claims 5.5 stops under CIPA pitch/yaw conditions with Planar T* FE 50mm F1.4 ZA. Active movie stabilisation adds a crop.
FlashExternal flash support, no built-in flash (Photography Blog); sync up to 1/250 second with maker flash-output restrictions–
Exposure controlsSeparate still/video/S&Q controls and custom settings; maker V-Log claim 14+ stops; no measured stills dynamic range inferred–
Video
Highest video resolution5952 × 3968 at 29.97 fps3840 × 2160 at 60 fps
Video detailInternal 5952×3968 3:2 open-gate HEVC 4:2:0 10-bit up to 29.97p; 5952×2512 2.4:1 up to 59.94p and 5888×3312 up to 29.97p. Own maker supplement lists internal ProRes RAW HQ/RAW 5776×3056 up to 29.97p and C4K up to 59.94p; recording media and image-area restrictions depend on mode. ARRI LogC3 requires separately purchased DMW-SFU3A keyInternal 4K up to 60p, including 10-bit 4:2:2; 60p/50p uses APS-C/Super 35 rather than full-frame readout. Full-frame 4K 30p uses 7K oversampling. Full HD up to 120p; S-Log3, HLG and S-Cinetone. USB streaming tops out at 4K 15p or Full HD 60p, separately from internal recording.
AudioStereo built-in microphone; MOV LPCM up to 96 kHz/24-bit; optional DMW-XLR2 required for 32-bit float; channel/sample-rate restrictions depend on adapter and format–
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3″
Screen dots1,840,0001,036,800
TouchscreenYesYes
Tilting screenYesYes
Display detailThree-inch 3:2 capacitive touchscreen, approximately 1.84 million dots and 100% coverage; tilt and free-angle articulation (Panasonic UK)Side-opening vari-angle touchscreen, approximately 176° opening and 270° rotation; dots are not image pixels
Viewfinder detail0.5-inch OLED, approximately 5.76 million dots, 100% coverage and 0.78× magnification with 50 mm lens at infinity, −1 dioptre and 3:2 aspect ratio0.5-type OLED; 3,686,400 dots; 100% coverage; approximately 0.78× magnification; 60 or 120 fps display
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)340 photographs580 photographs
Body weight712 g573 g
Release detailPanasonic UK confirms available June 2025; no exact retail day inferred; current UK announcement lists £2399 while Amateur Photographer reports £2299 without the same maker price basisSony Hong Kong states 25 November 2021 availability; the UK announcement gives December 2021. Announced on 21 October 2021. This is ILCE-7M4, not the Alpha 7R IV or Alpha 7S III.
Recording mediaOne CFexpress Type B slot and one SD/SDHC/SDXC UHS-II slot; dual-slot recording options; no XQD compatibility inferred from Photography Blog's conflicting tableSlot 1 accepts CFexpress Type A or UHS-I/II SD cards; slot 2 accepts UHS-I/II SD cards
PortsUSB-C 10 Gbps with USB Power Delivery, full-size HDMI Type A, 2.5 mm remote, 3.5 mm stereo microphone and headphone connections; no dedicated timecode or flash-sync terminal in Japan tableFull-size HDMI Type A; USB-C 10Gbps with Power Delivery; Multi/Micro USB; 3.5 mm microphone and headphone sockets; Multi Interface Shoe with digital audio
Wireless connectionsWi-Fi 2.4 GHz 802.11b/g/n and 5 GHz 802.11a/n/ac; Bluetooth Low Energy 5.0; Japan channel ranges not assumed identical in every regionDual-band Wi-Fi 802.11a/b/g/n/ac, subject to regional 5 GHz restrictions; Bluetooth 4.1
Battery life detailDMW-BLK22; SD-card CIPA approximately 340 EVF/380 LCD shots with S-R24105, or 1200 in specified power-save EVF mode; CFexpress gives approximately 330/370 or 1050 respectivelyNP-FZ100. Current Sony Japan specifications give approximately 580 photographs with the monitor or 520 with the viewfinder under CIPA conditions; Photography Blog's launch review instead reports a 610-shot claim. Main figure follows the current maker table.
ChargingIn-camera USB charging and power supply, including USB Power Delivery; optional DMW-AC11 AC adapterIn-camera USB-C charging and USB Power Delivery
DimensionsApproximately 134.3 × 102.3 × 91.8 mm, excluding protrusionsApproximately 131.3 × 96.4 × 79.8 mm; 69.7 mm depth from grip to monitor
Weight detailPanasonic UK specifies 712 g body only and 795 g with shoe cover, battery and SD card; photographed body excludes lensApproximately 573 g body only; current Sony specifications give 658 g with battery and memory card. Photography Blog incorrectly describes the loaded figure as excluding battery/card; it is not used as body weight.
MaterialsDust, splash and freeze-resistant body; maker operating range −10 to 40°C with cold-temperature battery and lens restrictions; no waterproof rating inferred–
In the boxJapan maker lists battery, battery charger, shoulder strap, body cap, hot-shoe cover and battery-grip contact cover; regional bundle contents may vary–

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