Originally posted by sundown For a long time I thought that's true too but it turns out that: "The S1 uses what Panasonic claims is a newly designed full-frame 24.2 Megapixel sensor. In order to maximize resolution, there's no optical low-pass filter, though it does have an anti-reflective coating to reduce ghosting and flare." - DPR.
To be honest I don't know. A while ago, I downloaded raw images from the DPR studo comparison tool.
In order to compare camera side by side, I demosaiced RAW files to 144Mpixel ( 2 x pixels in X axis and 2 x pixels in Y axis, of K1 native pixel count).
Using the exact same RAW export processing, I compared K1 pixel shift 144Mp JPEG export to 144Mp JPEG exports from Nikon Z7, Sony A7RIV, PanaS1, Pentax 645Z, GFX50S, and GFX100.
I did a blind test , side by side, without knowing which camera was used. The only file export that stand out from the others was from the GFX100. I examined a second time, third time, I could eventually tell the A7RIV apart it was really hard to do. I couldn't tell the difference between K1 PS, Z7 , 645z and GFX50, and I could tell which one was the S1 because the image was softer. Then I was intrigued by the S1 pixel not being as detailed as others, and I just concluded for myself that "the softness must be due to the low pass filter". So maybe it's something else.
P.S. below the youtube video, there is a link with the images files from both K1 and S1. We can compare two crops: K1_6766crop.jpg and P1012225crop.jpg. This shows pretty much what I've found in my comparison, K1 wins on stills.