Head-to-head · Best Full-Frame Mirrorless Cameras

Panasonic Lumix S1R II vs Sony A1 II

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Panasonic Lumix S1R II comes out ahead by a narrow margin (4.4 vs 4.3). The gap is mostly about value-focused hybrid shooters wanting high resolution plus strong video — read the strengths below before deciding.

Higher ratedRanked #4 in Best Full-Frame Mirrorless Cameras

Panasonic Lumix S1R II

4.4

4 sources$4,499.95as of Aug 1

The Panasonic Lumix S1R II is the value flagship here. PhotographyBlog gave it 5/5 and TechRadar 4.5/5, while PCMag was more reserved at 3.5/5, citing the AF gap. You get 44 MP, 8.1K ProRes RAW, and pro video features for roughly $1,000 less than the Canon R5 II or Nikon Z8. The L-mount lens ecosystem and slightly trailing AF are the reasons to pay up for Nikon or Canon if the budget allows.

Strengths

— 44 MP partially-stacked BSI sensor — surprisingly close to stacked performance at a lower price than the Nikon Z8 or Canon R5 II
— 8.1K/30p Apple ProRes RAW internal + V-Log for pro video colorists — video-first flagship among this list
— In-body stabilization rated to 8 stops; Dual IS 2 with compatible lenses hits ~9.5

Watch-outs

— L-mount lens ecosystem is smaller than Sony E, Canon RF, or Nikon Z — fewer native lens options, especially primes
— Battery life trails competitors at 350 shots CIPA
— PCMag's 3.5/5 score reflects softer consensus — some reviewers feel the AF still trails the big three even with phase detect

$4,499.95 · Check Price on Amazon Full review →

Ranked #5 in Best Full-Frame Mirrorless Cameras

Sony A1 II

4.3

2 sources$6,998as of Aug 1

Sports and wildlife professionals are the audience for the Sony A1 II, which Tom's Guide rated 4.5/5 and PCMag 4/5. Stacked sensor, 30 fps burst, and AI subject detection add up to the fastest autofocus-and-capture combination on the market. Price is what keeps it off the default recommendation: at $6,500 you need to be shooting professional sports or wildlife for the extra $2,200 over the Canon R5 II or Nikon Z8 to pay off.

Strengths

— 50 MP stacked BSI CMOS sensor with the fastest readout of any camera here — essentially zero rolling shutter
— 30 fps RAW burst with full AF/AE tracking plus pre-capture
— 8.6K/30p and 4K 120p 10-bit video with AI-driven subject recognition including birds in flight

Watch-outs

— $6,500 MSRP — by far the most expensive camera on this list, nearly 2× the Panasonic S1R II
— Incremental upgrade from the original A1 — reviewers noted it's more 'refinement' than 'revolution'
— Heavy at 743g — the A7R V at 723g or the Nikon Z8's similar weight make that less of a differentiator

$6,998 · Buy at avcstore.com Full review →

How they stack up

Panasonic Lumix S1R II

44MP with class-leading video specs at the lowest entry of the high-res group; smaller lens ecosystem than Canon/Sony/Nikon.

Sony A1 II

The do-everything flagship — 50MP at 30fps — but by far the most expensive here.

Specs side-by-side

Spec	Panasonic Lumix S1R II	Sony A1 II
Sensor	44MP BSI CMOS	50MP Stacked BSI CMOS
ISO	80–51200	100–32000 (exp. 50–102400)
Video	8K/30p, 5.8K/30p ProRes RAW	8K/30p, 4K/120p
Stabilization	IBIS, up to 8 stops	IBIS, up to 8.5 stops
Weight	795 g	743 g
Storage	CFexpress Type B + SD UHS-II	Dual CFexpress Type A / SD UHS-II

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