p.1 #1 · Has anyone tested M-mount lenses on the Lumix S1RII
Given the frequent collaboration between Panasonic and Leica, I am curious if anyone has tested Leica M-mount lenses on the new Lumix S1RII. I suspect they might even share the same sensor technology. It seems like a logical move for sourcing and production efficiency, especially considering Leica's smaller manufacturing volume. Has anyone noticed any performance similarities or issues when using M glass on this body?
p.1 #2 · Has anyone tested M-mount lenses on the Lumix S1RII
Leica SL cameras are known for having sensors optimized for M lenses, especially when it comes to the microlens design. Panasonic S cameras use a thicker sensor stack, which means you can see more or less noticeable compromises when adapting M lenses, especially below 50mm. Nikon Z, on the other hand, has a thinner sensor stack, but also lacks the specific microlens optimization.
p.1 #3 · Has anyone tested M-mount lenses on the Lumix S1RII
Yes, that information has been published. The total thickness of the two layers of cover glass on the SR1 II is 2.4mm. It is designed to work well with L mount lenses. But that is very thick and will result in corner smearing with many M lenses. It is even thicker than Nikon's covers which vary between 1.1 and 2.5mm. Sony's is thought to be around 2.0mm.
The SL line of cameras has a sensor cover glass thickness of less than 1mm and often stated to be 0.8 mm in order to optimize M lenses.
The Leica M11 utilizes an exceptionally thin sensor cover glass stack (typically measuring less than 1 mm) to accommodate legacy wide-angle M-mount lenses. By combining bespoke microlenses with a very thin UV/IR cut filter, Leica minimizes light refraction and corner smearing.
So once again we see that the SL3-P is not a simple rebranding of the S1RII. There are many meaningful differences.
Jul 09, 2026 at 01:06 PM
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p.1 #4 · Has anyone tested M-mount lenses on the Lumix S1RII
1bwana1 wrote:
Yes, that information has been published. The total thickness of the two layers of cover glass on the SR1 II is 2.4mm. It is designed to work well with L mount lenses. But that is very thick and will result in corner smearing with many M lenses. It is even thicker than Nikon's covers which vary between 1.1 and 2.5mm. Sony's is thought to be around 2.0mm.
The SL line of cameras has a sensor cover glass thickness of less than 1mm and often stated to be 0.8 mm in order to optimize M lenses.
The Leica M11 utilizes an exceptionally thin sensor cover glass stack (typically measuring less than 1 mm) to accommodate legacy wide-angle M-mount lenses. By combining bespoke microlenses with a very thin UV/IR cut filter, Leica minimizes light refraction and corner smearing.
So once again we see that the SL3-P is not a simple rebranding of the S1RII. There are many meaningful differences....Show more →
Measuring sensor stack thickness is not easy, especially doing so with precision. The 1.1mm for Nikon, however, is almost certainly wrong. That was an early measurement from Kolari that did not include a layer of glass directly on the sensor. They later clarified that. Hopeful Nikon users still quote it, however. Having used Leica M, Sony E, Nikon Z, and Canon RF cameras with Leica M mount lenses Nikon cameras are a little closer to Sony in performance than a Leica M, but Nikon is a little better than Sony. I would say Canon is between Sony and Nikon but it is hard to tell it apart from either. I haven’t used Panasonic but if 2.4mm is right for the sensor glass thickness it is probably in the same range as Canon and Sony.
