M lens with S1RII Lumix

[ALAIN]

Hello,
I just received a 500mm 5.6 Sigma Pro L and I'm about to buy a 1.4x extender and a Lumix S1RII.
I have a range of Leica lenses: 18, 35F2, 50F2.5, 135apo M, and 180apo R.
The S1RII has been out for a relatively short time, but perhaps some users can already share their impressions of using M lenses on this camera body, in photos, but why not also in videos?
Thanks in advance

 

[Babylonia]

In general, M lenses on a Panasonic camera, specially the short focal length lens models, are not suited for it.
As the micro lenses array above pixels of the Panasonic used sensors, is not optimum for using Leica M lenses.
Specially to borders and corners, they suffer by quality by the wrong optical characteristics.

Only real Leica camera's of the L-mount family (S2 - S3...) are optimised for using M-lenses
By having specialised micro lenses above the sensor. And combination of thickness of sensor cover glass.

Much can be found e.g. at testing of lenses at e.g. Fred Miranda community.

https://www.fredmiranda.com/forum/

https://www.fredmiranda.com/forum/board/55/

Check results of lenses using Sony camera models. That suffer more or less from the same "bad" characteristic.
E.g. that is the reason a brand like "Voigtländer" offer lenses specially with extra correction for models used for Nikon Z, or Sony.
Different for M lenses used at (digital) Leica optimised camera's.

 

[ALAIN]

Thank you for that !
Indeed, I noticed these drifts with an A7R a while ago, but starting at 50mm and not too wide open, the results were interesting.
I recently used a 135mm apo M on an X2D (Mount Fuji showed up and I quickly took what I had with me and, aside from the vignetting, the result is excellent with Hasselblad's unique colorimetry.
I agree with you that the 18 is to be excluded on the Pana, but for longer focal lengths, I would have liked to find real tests on the internet...