You asked
Can I use adapted lenses on the panasonic lumix s1 iie?
Here is what the site says about that.
From Panasonic Lumix S1 IIE: Panasonic Lumix S1 IIE: A mirrorless camera by Panasonic with a 24.2-megapixel full frame sensor, announced in 2025. The S1 II body with a simpler 24-megapixel sensor, for less money. Specs - Maker: Panasonic - Mount: L-Mount - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 24.2 megapixels - Stabilisation: in the body - Announced: 2025 - Type: mirrorless camera Focal lengths on it Full frame is the reference size: lenses ...
From Sensor sizes: The main sizes: - Full frame (36 x 24mm, the size of a 35mm film frame). The reference size: when people quote a focal length "in full-frame terms", this is what they mean. - APS-C (about 23 x 15mm). Crop factor about 1.5x (1.6x on Canon). Most entry and mid-range mirrorless cameras. - Micro Four Thirds (about 17 x 13mm). Crop factor 2x. Small, light systems from OM System and Panasonic. - 1-inch ...
Quoted from this site's pages.