Panasonic S1 II and S1 IIE

[Crem]

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Any idea what a "partially stacked" sensor is? I know about stacked sensors, but not this middle ground. I would love to see a stacked sensor in a Leica such that we could move away from mechanical shutters for many situations.

Personally I really like this new 24-60mm. It reminds me of the Sony 24-50mm which covers 95% of what I use a camera for.

Edited May 13 by Crem

[Simone_DF]

20 minutes ago, Crem said:

Any idea what a "partially stacked" sensor is? 

https://www.digitalcameraworld.com/news/what-exactly-is-a-partially-stacked-sensor-nikon-partially-explains-the-z6-iii

[SrMi]

3 hours ago, Crem said:

Any idea what a "partially stacked" sensor is? I know about stacked sensors, but not this middle ground. I would love to see a stacked sensor in a Leica such that we could move away from mechanical shutters for many situations.

Personally I really like this new 24-60mm. It reminds me of the Sony 24-50mm which covers 95% of what I use a camera for.

From DPR:

"This is a conventional BSI sensor with more complex readout circuitry applied as an additional layer around the edges of the sensor. This allows faster readout than with a BSI chip with single-layer readout circuitry, but without the significantly higher manufacturing complexity and cost of a fully Stacked CMOS design."

[Crem]

Thanks for the links and info @Simone_DF and @SrMi. I did some googling and believe I made sense of what is boils down to... sensor readout speed: https://www.zsystemuser.com/z-mount-cameras/z-camera-articles/sensor-read-out-speeds.html

• Normal sensor Z6 is 1/20
• Partially stacked Z6III is 1/69
• Fully stacked Z8 is 1/268

Clearly for the price of a Leica, I really hope they go with a fully stacked sensor in the next few years.

[jaapv]

But this is  Panasonic . What I find interesting is the price difference between the two models  which are virtually identical. The only real difference appears to be enhanced IBIS on the video slanted model and pre-release on the stills model. 

[deonvnzl]

This release is exactly what I wished the SL3-S to be.  
Such a shame Leica couldn't delay their release a couple of years and include more of this tech. 

[rsolomon]

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would this have any impact on how M lenses would perform ? 

[roma]

I can’t imagine it will be as good as on the SL bodies, but we’ll see once the reports come out. I’m also interested in how the wide angle Ms do on these two. 

[frame-it]

https://wolfcrow.com/important-quirks-and-features-of-the-panasonic-s1ii-for-cinematography/

[padam]

6 hours ago, rsolomon said:

would this have any impact on how M lenses would perform ? 

https://petapixel.com/2025/05/05/using-m-lenses-on-a-panasonic-camera-sacrifice-sacrilege-or-sweet-spot/

[jaapv]

A Canon R5 Ii costs considerably more, for instance.(4900 €)  I doubt whether they will have any pricing issues.  I is still a value for money camera in its class with the advantage of the L mount. 

[jaapv]

6 hours ago, padam said:

https://petapixel.com/2025/05/05/using-m-lenses-on-a-panasonic-camera-sacrifice-sacrilege-or-sweet-spot/

Maybe. I understand that the new iteration uses a different sensor. 

[Stuart Richardson]

On 5/14/2025 at 7:11 AM, jaapv said:

But this is  Panasonic . What I find interesting is the price difference between the two models  which are virtually identical. The only real difference appears to be enhanced IBIS on the video slanted model and pre-release on the stills model. 

What about the sensors? They each use a different sensor. It sounds like the E model uses the S5II sensor and the non-E model uses a new sensor. I admit, I could not really tell the intended use apart from their press release. The S1IIE seems to have higher video resolution, but the S1II seems to have better DR and speed. Honestly, at least as presented I find it really confusing. Why do two cameras that seem essentially the same?

[jaapv]

As far as I can make out both models use a partially stacked sensor or according to other sources only the E.  So there is very little to be deduced there. We’ll have to wait for the reviews. 

[Stuart Richardson]

They have different resolutions and dynamic range figures, so I think they are different sensors. 

[sebben]

@Stuart Richardson one of them supposedly has higher dynamic range by 1 stop because of the new sensor
 

I’m not sure if the paid firmware upgrade to use the Arri Clog profile for video will work in both cameras. I agree that is rather confusing how they presented these cameras. The SL4 looks like it will be a nice camera 🤣

[BernardC]

The S1II uses a new 24MP sensor. It can do 70 fps RAW bursts and has less rolling shutter in video.

The S1IIE has a cheaper 24MP sensor (from the S5II/S9?). It can do 30 FPS RAW bursts and has more rolling shutter effect in video.

The S1II has a few more video features, like ProRes RAW and a future paid Arri Log option. The E is also very good at video, but it isn't necessarily better that the cheaper S5IIx.

Most stills shooters will want the E. The $500 difference pays for an extra Lumix lens. The only reasons to pay more for the non-E are 70fps bursts and faster electronic shutter readout. Panasonic only allows maximum burst rates with electronic shutter (something several reviewers have complained about), so you might prefer 30fps over 70fps because your buffer won't fill-up as fast.

 

[BernardC]

Correction: some specs say that the E does ProRes RAW, others don't. I don't think it's a big selling point either way, because FinalCut has very little market share anymore. I wish Panasonic and Leica would support BRAW instead.

[Stuart Richardson]

Well, if the sensor is different, then I think we will have to wait to see if it takes different enough images to be worth the 500 dollars (which frankly is not a lot for many people reading the Leica forum, at least if it translates into a real performance gain). It will be interesting to see the difference in high ISO and post-processing leeway, noise character etc.

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Hallo,

Look here: Leica L-Mount

[rsolomon]

11 hours ago, padam said:

https://petapixel.com/2025/05/05/using-m-lenses-on-a-panasonic-camera-sacrifice-sacrilege-or-sweet-spot/

Thanks !