After all of this, the moment of truth is here: our Panasonic Lumix DMC-G1 review unit rolled into the office a few weeks back and has been. Released in , the DSLR-styled Panasonic Lumix DMC-G1 introduced the world to the Micro Four Thirds standard. Micro Four Thirds - and by extension the. Operating Instructions for most Panasonic products are now available online in Adobe PDF format. Acrobat Reader is available free from the Adobe website.