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Letus 35 Ultimate - shakiness

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Kai Cheong
Letus 35 Ultimate - shakiness
on Jun 28, 2009 at 8:31:00 am

I'm predominantly a "preditor", but I do help sort out basic technical issues relating to cameras at work. Needing some help here from the camera pros about the Letus35 Ultimate adapter.

We recently used the Letus on a shoot using a Sony Z1-P camera and shooting at HDV 1080i, 25fps. The rig was fixed at a reputable camera rental shop by an experienced DP and was operated by a seasoned DP, who had researched the Letus but was using it for the first time. We monitored using an Ikan V8000W monitor via component output [learnt from the experience - the fact that it still overscanned by about 5% meant we didn't discover that we should've zoomed in more].

After capturing the footage into FCP, we realize that on the tele tight shots, the shots are a little jittery. Even though the camera was on sticks, level ground and had minimal movement [mostly some racks and pans]. We're suspecting it has to do wih the spinning ground glass system, which was set at 99, on advice of the rental house.

Anybody able to provide an educated guess or advice on avoiding this shot jitter when using the Letus Ultimate? We have an upcoming project which we're planning to use lenses as well but because of this jitter on tight shots [the project require very tight and still shots], we might need to shell out a bit more for a camera that takes interchangeable lenses directly.

Kai
FCP Editor / Producer with Intuitive Films
http://kai-fcp-editor.blogspot.com
--
Now 'LIVE'! Check Out The Intuitive Films Blog @ http://intuitive-films.blogspot.com

At Intuitive Films, We Create: TV Commercials, Documentaries, Corporate Videos and Feature Films
Visit us @ http://www.intuitivefilms.com
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MacBook Pro 2.4GHz | 4GB RAM | FCP 5.1.4 | Mac OS X 10.5.2


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John Cummings
Re: Letus 35 Ultimate - shakiness
on Jun 28, 2009 at 1:55:24 pm

My educated guess is that it might have something to do with the camera's optical image stabilization (aka super steady shot) being left on?

J Cummings
Cameralogic/Chicago
cameralogic.tv
HDX-900/HDW-730S/DXC-D50


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Atticus Culver-Rease
Re: Letus 35 Ultimate - shakiness
on Jun 30, 2009 at 3:49:47 am

When you say this was happening on tight telephoto shots do you mean it was only showing up when you were using a lens with a long focal length on the adapter? If so, I don't think there's any problem with the Letus. If the ground glass was the issue I would expect it to be shaky no matter what lens you had on. What focal length were you at when you were seeing these problems? And what sort of tripod were you using?


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Kai Cheong
Re: Letus 35 Ultimate - shakiness
on Jul 4, 2009 at 3:51:31 pm

Thanks for the advice, guys.

I'm gonna forward this over to my DP and maybe he'll have a better idea on how we could avoid this on our next shoots.

Kai
FCP Editor / Producer with Intuitive Films
http://kai-fcp-editor.blogspot.com
--
Now 'LIVE'! Check Out The Intuitive Films Blog @ http://intuitive-films.blogspot.com

At Intuitive Films, We Create: TV Commercials, Documentaries, Corporate Videos and Feature Films
Visit us @ http://www.intuitivefilms.com
--
MacBook Pro 2.4GHz | 4GB RAM | FCP 5.1.4 | Mac OS X 10.5.2


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Andrew Tidby
Re: Letus 35 Ultimate - shakiness
on Sep 17, 2009 at 6:10:28 pm

I had the same issue. I turned off the Image Stabilizer and it fixed the problem.
I was told by a Letus Guru that the camera is trying to stabilize off the moving glass.


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