> What IS the cause of this strobing (actually, a flicker) effect? Is it > actually because China is 50 cycles (my theory) and my equipment is > shooting at 29.97 fps? And why should this be true if am on batteries the > whole time? As you guessed, it's a beat frequency arising from the 50 Hz lighting and the 60 Hz (roughly) capture. The light from fluorescents is not continuous, but has brightness peaks and troughs during each cycle of the power supply. Since your "shutter" isn't really open continuously (there is no light integration during the vertical blanking interval), you'll see this flicker as the phase of the lighting's cycles drifts w.r.t. your capture cycle. This will happen with the camera on AC or on batteries. If you have a 1/100 shutter setting on your NTSC can, try that. It's claimed to reduce visible flicker when shooting in 50 Hz countries, though I can't verify it from experience. Cheers, AJW
I just got this from a friend. Hank & Co, care to verify? Is this the source of the dreaded audio hiss being reported on the VX2000/PD150? Yesterday I found the viewfinder generates a low volume, high frequency background sound which is picked up by the built-in mic or audio circuit. The noise vanishes when the side mounted LCD viewer is used and the viewfinder is not on.
Interesting, eh? Adam Wilt
(diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-)
