Watching Ron Wanttaja's Tail Rise

I thought I already posted this explanation but its a day later and I
don't see it so here goes again...

The camera scans its electronic shutter from top to bottom. On a
bright sunny day, the AGC sets the shutter to be a narrow horizontal
slit and because its such a short exposure (as short as 1/15,000) the
camera has the ability to capture the propeller in motion. If you put
a filter in front of the lense (neutral density filter) the AGC of the
camera will lengthen the exposure and make the propeller blur the way
people are used to. The stronger the filter the better but stop
before you start seeing noise in the image. And just so you know the
rough order of the amount of attenuation you'll need on that filter,
understand that the light outside may be 100 times brighter than
inside so you might want something like 99% attenuation.

Regards


"Ron Webb" wrote in message ...
An interesting effect with the prop. I suppose it is some digital version of
the frame rate vs prop RPM stroboscope effect that we are used to seeing,
but modified because of the digital camera thing.

Anybody got a better explaination?


Ron Webb



" jls" wrote in message
...
Neat. And good resolution for a $125 camera too:

http://www.bowersflybaby.com/pix/video.html