Panasonic GH2 depth of field test with fully manual prime lens Ricoh Rikenon 50mm f/2.0 using an adapter from fotodiox for Pentax K Mount to micro 4/3. I had this lens in the closet for 20+ years and finally get to use it again!
Lens manually set to f/2.0 and through the lens metering is working (if I'm saying that right - I'm not an expert), you don't have to guess - it shows the under/over exposure meter on the LVF/LCD. The f number says 0.0 and I set shutter to 125, and found ISO 320 gave correct exposure. For a manual lens to work you must set Custom tools menu, 7th page, Shoot w/o Lens to ON. Otherwise the shutter will not release, I guess because the camera thinks there is no lens.
Camera settings: Dial set to Creative Movie Mode, menu Manual Movie Mode. Motion Picture set to Film Mode: Cinema -2 +1 0 -2. Rec Mode: AVCHD 1080i, Rec Quality: FSH (17 Mbps 60i)
Sorry for the hand held - waiting for my tripod to arrive.