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-   -   Pulsating Zooms (https://www.dvinfo.net/forum/sony-xdcam-ex-pro-handhelds/118881-pulsating-zooms.html)

Michael H. Stevens April 8th, 2008 10:16 AM
Pulsating Zooms
 
I'm shooting 1920x1080x24p with a 1/48th shutter. On all my zooms (done at moderated speed in bright light) I am getting a "pulsating" effect. Why is this and what is the cure? The zoom speed is smooth and consistent it is the light intensity that pulsates.

Should I be using a faster shutter for pans and zooms?

Michael Mann April 8th, 2008 11:00 AM
Do you notice only a pulsating of brightness - or of focus as well?
Does this ocuur only in progressive mode and when auto focus is switched on?

Steven Thomas April 8th, 2008 12:10 PM
Michael, could you post a small video example?

Michael Mann April 8th, 2008 12:18 PM
Steven, I don't own a EX1 yet.
But the Canon A1 shows focus pulsing when zooming with AF switched on, especially in progressive mode.

Steven Thomas April 8th, 2008 12:44 PM
Mike, that question was to the original Mike who posted the issue. ;)

Michael Mann April 8th, 2008 01:25 PM
Oops, sorry.

Michael H. Stevens April 8th, 2008 07:34 PM
Quote:
Originally Posted by Michael Mann (Post 856457)
Do you notice only a pulsating of brightness - or of focus as well?
Does this ocuur only in progressive mode and when auto focus is switched on?
Michael et all:

With a closer look it is
A) A lateral fast shaking - back and forth. No change in brightness or focus
B) It only happens at the left and right 1/3rd of the image. The center third is still and normal.

As I described the problem wrong originally let me start a new thread and forget this one.


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