"Z? Carioca" <joaosilva5435@hotmail.com> wrote in message

news:e299b146.0404250612.43beecb@posting.google.com...

> My camera Panasonic PV-DV953 doesn't have a built in Neutral Density

> Filter, but I'm determined to get

> low DOF by opening the iris to the maximm. I live in the interior of

> Brazil and it's impossible to get a 43 mm ND here in less than a

> month.

> I can get the iris full open by increasing the shutter speed though.

> And then comes the strobbing effect.

>

> Now the question: Is there any kind of virtualdub filter or pos

> processing tool that would correct the strobing effect so i can get a

> smooth

> video with low DOF and without a ND filter? Is it possible anyway?

You can apply a gaussian filter during movement parts

that show the problem (or "frame blending", if you can

get that to work...;-) while editing, but that is no fun...

Adding two polarizers can make a variable-density

ND filter, and AWB can neutralize their color bias (use

only a linear type on the outside, furthest away from the

lens...). I have used this to permit daylight IR shooting

with cameras that lock the setting to widest aperture and

1/60th (NTSC) shutter when "nightshot" is engaged...

--

David Ruether

d_ruether@hotmail.com

http://www.David-Ruether-Photography.com