Sony Alpha 7 III vs Pentax 645D

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      Specifications

      General Sony Alpha 7 III Pentax 645D
      BrandSonyPentax
      ModelAlpha 7 III645D
      Predecessor ModelSony Alpha 7 II
      Successor ModelSony Alpha 7 IV Pentax 645Z
      MSRP$2000
      Camera TypeInterchangeable LensInterchangeable Lens
      Body TypeMirrorlessDSLR
      Video Capture
      Sensor Sony Alpha 7 III Pentax 645D
      Sensor TypeBSI-CMOSCCD
      Sensor SizeFull FrameMedium format
      Sensor Dimensions35.8 x 23.8 mm44 x 33 mm
      Total Pixels25.3 Megapixel40 Megapixel
      Effective Pixels24.2 Megapixel40 Megapixel
      Low Pass Filter
      Native ISO Range100 - 51,200200 - 1,600
      Boosted ISO Range50 - 204,800100 - 1,600
      Photo Sony Alpha 7 III Pentax 645D
      ProcessorBIONZ XPRIME II
      Max Image Resolution6000 x 40007264 x 5440
      Other Resolutions6000 x 3376, 3936 x 2624, 3936 x 2216, 3008 x 1688, 3008 x 2000
      Image Aspect Ratios3:2, 16:94:3
      Image File FormatJPEG, RAW
      JPEG Quality LevelsExtra fine, fine, standardGood, Better, Best
      Bit Depth14-Bit14-Bit
      Timelapse Recording
      White BalancePresets: Auto, Cloudy, Color Temperature, Custom, Daylight, Flash, Fluorescent (Cool White), Fluorescent (Daylight), Fluorescent (Warm White), Incandescent, Shade, UnderwaterAuto preset modes: Auto, Daylight, Shade, Cloudy, Fluorescent (D, N, W, L), Tungsten, Flash, CTE
      Manual mode(s): Yes, manual and 3 color temperature selections available>br> WB fine adjustment available in all modes
      Focus Sony Alpha 7 III Pentax 645D
      Autofocus ModesMulti-area
      Center
      Selective single-point
      Tracking
      Single
      Continuous
      Touch
      Face Detection
      Live View      		Multi-area
      Selective single-point
      Single
      Continuous
      Live View
      Lens ServoAutomatic, Continuous-Servo AF, Direct Manual Focus, Manual Focus, Single-Servo AF
      AF Detection Range-3 to +20 EV
      Number of Focus Points69311
      Touch-to-Focus
      Live View Autofocus
      Animal Eye Detection
      Vehicle Tracking Mode
      Insect Tracking Mode
      Contrast Detection for Autofocus
      Phase Detection for Autofocus
      Optics Sony Alpha 7 III Pentax 645D
      Lens MountSony EPentax 645AF2
      Crop Factor1x0.79x
      Image Stabilization5-Axis Sensor Shift
      Image Stabilization Compensation5 stops
      Digital Image Stabilization
      Screen Sony Alpha 7 III Pentax 645D
      Screen TypeTiltingFixed
      Screen TechnologyTFT Color LCD with wide-viewing angle and with AR coating
      Touch Screen
      Screen Size3.0"3.0"
      Screen Resolution922k dot921k dot
      Top LCD Screen
      Live View
      Live Composition
      Viewfinder Sony Alpha 7 III Pentax 645D
      ViewfinderElectronicOptical (pentaprism)
      Viewfinder Size0.5"
      Viewfinder Coverage100%98%
      Viewfinder Magnification0.78x0.56x
      Viewfinder Magnification (35mm equivalent)0.78x0.71x
      Viewfinder Resolution2,359k dot
      Viewfinder Eyepoint23 mm
      Diopter Adjustment-4 to +3
      Shutter Sony Alpha 7 III Pentax 645D
      Shutter TypeElectronic
      Min Shutter Speed30 sec30 sec
      Max Shutter Speed (Mechanical or 1st Curtain)1/8000 sec1/4000 sec
      Max Continuous Shooting10.0 fps1.1 fps
      Continuous Shooting Resolution/fps/bufferUp to 10 fps at 24.2 MP for up to 89 Frames (Raw) / 177 Frames (JPEG)
      Up to 8 fps at 24.2 MP
      Up to 6 fps at 24.2 MP
      Up to 3 fps at 24.2 MP
      Flash Sony Alpha 7 III Pentax 645D
      Built-in Flash
      Flash ModesAuto
      On
      Off
      Red-eye
      Slow Sync
      Rear Curtain
      Max Flash Sync Speed1/250 sec1/125 sec
      Flash Compensation-3 to +3 EV (1/3, 1/2 EV Steps)
      External Flash Connectivity
      External Flash SystemTTLPentax
      External Flash ConnectionIntelligent Hot ShoeHot Shoe (P-TTL, high speed sync available), wireless with PENTAX dedicated flash, X-sync socket
      Exposure Sony Alpha 7 III Pentax 645D
      Exposure Metering ModesMulti
      Center-weighted
      Highlight-weighted
      Average
      Spot      		Multi
      Center-weighted
      Spot
      Exposure ModesAperture Priority, Auto, Manual, Program, Shutter PriorityProgram (P), Sensitivity Priority (Sv), Shutter Priority (Tv), Aperture Priority (Av), Shutter and Aperture Priority (TAv), Metered Manual, Bulb, X-Speed
      Metering Range-3 to +20 EV+2 to +21 EV
      Exposure Compensation±5 EV (1/3 EV, 1/2 EV increments)±5 EV (1/3 EV, 1/2 EV increments)
      Exposure Bracketing ±5 EV (3, 5 shots at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV increments) ±2 EV (3, 5 shots at 1/7 EV, 1/5 EV, 1/3 EV, 1/2 EV, 2/3 EV, 1 EV increments)
      Exposure LockLocked when shutter button is pressed halfway. Available with AE lock button (On/Off/Auto)
      DXO Sony Alpha 7 III Pentax 645D
      DxO Low Light ISO37301262
      DxO Color Depth25.024.6
      DxO Dynamic Range14.712.6
      DxO Overall Score9682
      Video Sony Alpha 7 III Pentax 645D
      Internal Recording ModesH.264/XAVC S
      4K UHD: 3840 x 2160 @ 23.98/25/29.97 fps [60 to 100 Mbps]
      Full HD: 1920 x 1080p @ 23.98/25/29.97/50/59.94/100 fps [16 to 100 Mbps]
      AVCHD/H.264
      Full HD: 1920 x 1080i @ 50/59.94 fps [17 to 24 Mbps]
      Interval Recording
      Video FormatsMPEG-4, AVCHD, XAVC S, H.264
      Max Video Resolution3840 x 2160
      External Recording Modes4:2:2 8-Bit via HDMI
      UHD 4K (3840 x 2160) @ 23.98/24.00/25/29.97 fps
      1920 x 1080p @ 23.98/24.00/50/59.94 fps
      1920 x 1080i @ 50/59.94 fps
      No crop on 4K Videos
      Webcam Functionality
      Gamma CurveHDR-HLG, Sony S-Log 2, Sony S-Log 3
      Unlimited Video Recording
      Recording Limit30 min
      Terminals Sony Alpha 7 III Pentax 645D
      Audio I/O1 x 1/8" / 3.5 mm TRS Stereo Headphone Output
      1 x 1/8" / 3.5 mm TRS Stereo Microphone Input
      Power I/O1 x USB-C Input/Output
      Other I/O1 x Sony Multi/Micro-USB Input/Output (Shared with Remote Input)
      1 x USB-C (USB 3.2 / 3.1 Gen 1) Input/Output (Shared with Power Input)
      USB SpeedUSB 3.2 Gen 1x1 (5 GBit/sec)USB 2.0 (480 Mbit/sec)
      HDMI Output Micro
      SpeakerMono
      Built-in MicrophoneStereoStereo
      Microphone Input
      Headphone Output
      Flash Sync Port
      Connectivity Sony Alpha 7 III Pentax 645D
      Built-in GPS
      Built-In Wi-Fi
      Built-In Bluetooth
      NFC
      Mobile App Compatible *As of May, 2023: Check with manufacturer for the most up-to-date compatibility
      Remote Control RM-VPR1, VCT-XPR10, VCT-VPR1, RM-SPR1, RMT-VP1K (Optional) Optional, wired or wireless
      Environmental Sony Alpha 7 III Pentax 645D
      Environmental Sealing
      Operating Temperature32 to 104°F / 0 to 40°C14-104°F (-10 to 40°C)
      Physical Sony Alpha 7 III Pentax 645D
      Dimensions127 x 96 x 74 mm (5 x 3.78 x 2.91")156 x 117 x 119 mm (6.14 x 4.61 x 4.69")
      Weight (inc. batteries)650 g (1.43 lb / 22.93 oz)1480 g (3.26 lb / 52.21 oz)
      Box Dimensions (LxWxH)8.3 x 6.6 x 5.4"9.5 x 9.2 x 6.7"
      Package Weight2.485 lb6.2 lb
      Power and Storage Sony Alpha 7 III Pentax 645D
      Battery PackNP-FZ100D-LI90
      Battery Life610 shots800 shots
      USB Charging
      Internal Storage
      External StorageSlot 1: SD/SDHC/SDXC (UHS-II)
      Slot 2: SD/SDHC/SDXC/Memory Stick Duo Hybrid (UHS-I)      		Dual Slot: SD/SDHC
      Other Sony Alpha 7 III Pentax 645D
      Self Timer 2, 5 or 10 sec; continuous 3 or 5 exposures 2 or 10 sec
      Orientation Sensor
      Tripod Mounting Thread1 x 1/4"-20 Female (Bottom)
      Accessory Mount1 x Hot Shoe Mount
      Material of ConstructionMagnesium Alloy
      Electronic Level Gauge
      Sensor Cleaning/Dust Reduction SystemCharge protection coating on optical filter and image sensor shift mechanism


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