Im not sure but they appear to be, i am interseted to find out. Some companies like samsung re-brand cameras, in samsung's case they re-brand pentax. But, i know Panasonic uses Lecia lenses in their SZ's and Lecia makes 4/3 slr's as does panasonic. So they obviously have somewhat of a partnership although i am not sure.
Nikon D300+MB-D10 | Tamron 70-200mm f/2.8 | Tamron 90mm f/2.8 Macro | Sigma 10-20mm
18-200mm VR | 85mm f/1.8 | 50mm f/1.8 | SB-600 | Manfrotto 681B & 3232 Monopod--190XPROB & 488RC2 Tripod