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Sony ENG / EFP Shoulder Mounts
Sony PDW-F800, PDW-700, PDW-850, PXW-X500 (XDCAM HD) and PMW-400, PMW-320 (XDCAM EX).


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Old January 29th, 2010, 05:29 AM   #1
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Is it breathing that I see?

I went outside for the first time to test the camera. Right now it's really winter and about -20 degrees Celsius (about -4 F). I zoomed in a tree at full zoom and shot for a while. When I now look at the clip - the picture kind of "waves", almost like a hot desert clip.

Is it breathing that I see?
Why/how is this "possible"?
Can it be avoided (except NOT zoom in to much or buy a new lens)?

I have the Canon HD KH19x6.7 lens (VCL-719BXS) on a F330.

Last edited by Joachim Ljungquist; January 29th, 2010 at 08:26 AM.
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Old January 29th, 2010, 06:01 AM   #2
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Was there possibly a warm air current between you and the tree? Sound like hot air turbulence.
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Old January 29th, 2010, 07:11 AM   #3
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Haha... It might have been so!
I was actually standing on the balcony - with the door open. - "Big laugh!"

But anyway - what is breathing?
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Old January 29th, 2010, 10:49 AM   #4
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Breathing is the way the image gets smaller or larger as you turn the focus ring. Most lenses exhibit some breathing as you focus.
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Old January 30th, 2010, 02:14 AM   #5
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Alister:
Ahh - so that is the name of that "phenomenon" - and a quite annoying one!
Thanks, I did not know the english word for it, even that it now seem quite obvious :)
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