[Brightcolours]

12MP like the A7S, and like the A7S II.

Or as Sony puts it:

• Newly developed BIONZ XR™ image processing engine with eight times more processing power and a brand new 12.1-megapixel (, effective) back-illuminated full-frame Exmor R™ CMOS image sensor, significantly reduced rolling shutter effect
  
• Ultra-high sensitivity with ISO range expandable from 40 – 409,600, and improved image quality by approximately 1 stop noise reduction in the middle and high sensitivity ranges
  
• Video recording capabilities include 4K 120p[, 10 bit 4:2:2 color depth, All-Intra recording, XAVC HS format with H.265 codec and more
  
• 15+ stop dynamic range for movies
  
• 4K 60p 16-bit RAW video HDMI output for the first time in the Alpha™ series
  
• Fast Hybrid AF system with 759 point phase-detection AF sensors covering 92% of image sensor
  Enhanced Real-time Eye AF for movie recording and still image recording
  
• New heat dissipating mechanism and dual slot relay recording enables over one-hour long 4K 60p 10-bit 4:2:2 movie shooting　　
  
• 5-axis optical in-body image stabilization supports handheld movie shooting, with added Active Mode  to support especially difficult handheld movie shooting
  
• World’s brightest[x] and largest new 0.64-type 9.44 million-dot OLED electronic viewfinder
  
• Side Opening variable angle LCD screen enhances shooting flexibility
  
• Completely redesigned menu system with touch screen interface and touch operation
  
• High-speed continuous still image shooting at up to 10fps for more than 1,000 consecutive uncompressed RAW images[xii] with full AF / AE tracking
  
• Dual CFexpress Type A card slots that enable high speed data processing while keeping the compact size
  

So, basically a video MILC with stills afterthought, with no oversampled 4K and no DCI 4K. Or 12mp stills FF MILC for only $3500.

Big improvements: The colours don't suck anymore like they used to, maybe this camera will perform like the Sony FX9 in that area (but probably not?). And finally a Canon style swivel screen, and finally Canon style full touch screen.

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"Sony says that the sensor reads out twice as fast as on the a7S II, which considerably reduces rolling shutter".
Hmm....

Top: EOS R5 pre-production model
Bottom: Sony A7S III


  dA13mb.jpg (Size: 147.85 KB / Downloads: 10)

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Just saw a video comparing IBIS from this new Sony A7S III and Canon EOS R5... The Canon blows the Sony IBIS out of the water. Unexpected and impressive...
And outdoors in the sun, the R5 overheats later than the Sony A7S III (not so in airconditioned indoors situation). Neither overheated on the videographer in real life shooting situations.