The leaks are certainly building up the closer we get to Photokina 2012 in Cologne a couple of weeks from now. Today's leak comes courtesy of 43 Rumors, which has dumped a whole list of specs for Panasonic's rumored GH3 Micro Four Thirds camera that's apparently aimed to take down DSLRs with APS-C sensors like the Nikon D7000 and Canon 7D. The leaked specs are highlighted by a 16-megapixel sensor, maximum ISO of 12,800, the "fastest AF of any interchangeable lens system camera," and a magnesium alloy body that's — unsurprisingly — said to be bigger than its predecessor, the GH2 (pictured above). Be sure to check out the full specs below, but keep in mind that these are just rumor even though 43 Rumors says they come from "many trusted sources." We'll be at Photokina in a couple weeks' time to see if these specs pan out, so check back then.

- 16 Megapixel “Wide dynamic range” CMOS Sensor.

- New Venus 7 engine

- electronic shutter

- ISO 100-12.800

- 6fps

- Fastest AF of any interchangeable lens system camera.

- Video Bitrate 50Mbps (72Mbps ALL-I)

- 30p/25p in MP4, MOV and AVCHD

- 3.5 Mic in

- built-in stereo mic

- Audio out

- Pc control

- Time Code

- 1740k OLED LVF, Touch Monitor OLED 610k.

- external battery grip

- Wifi with remote control through iOS and Android Applications

- external XLR accessory

- Focus Peaking

- Interval shooting and slow motion. Slow Movie extension (40%, 50%, 80%) Fast 160/ 200 / 300%

- Magnesium alloy body. Body is bigger than the Panasonic GH2.