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Little invisible Camerashake!


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#1 Nick Janssen

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Posted 11 November 2016 - 04:15 PM

I've been looking very critically at my images and to my surprise I sometimes find a little shake into my shot.
Surprisingly, when I'm flying the camera it seems impossible to see this little vibration. 
After hours of practising, removing and and testing my gear I simply cant get rid of this little shake that occurs now and then.
Here some pictures of my setup. (sorry I couldnt load them in this message, please copy paste)

Picture 1
http://s561.photobuc...g34c2.jpeg.html

Picture 2
http://s561.photobuc...2we52.jpeg.html


I uploaded some footage here, which was shot with a 50mm zeiss F1.4: https://youtu.be/4nBdShyJsg0

What is the problem, and how to fix it??

Thanks in Advance!

 


Edited by Nick Janssen, 11 November 2016 - 04:17 PM.

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#2 Scott Monk

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Posted 11 November 2016 - 07:11 PM

Nick,

 

I'm not sure this is your problem, but I'll take a shot.

 

I had the same thing with a Zephyr when the post was fully extended. I had to extend it because I was flying a fully-decked Red One camera and there wasn't enough counter weight at the bottom of the sled to balance it without extending the post all the way. My technique was a little to blame some of the time, but one minor misstep and the thing shook like hell. 

 

It's a problem with thin-post sleds - if you extend the post very far (which you have to do with a heavy camera build), the extra mass on the top stage turns the thing into a vibrating pole. Picture a 6-foot piece of 1/2 inch PVC pipe. Put some weight on both ends (or just one), and balance it in your hand. Now, if you give it even a slight move, the ends wobble a lot. Same thing with your sled.

 

My solution was to not extend the post so much. How? Add more weight to the base to counter your top-stage weight. I put the optional battery hanger on the Zephyr base and put a double-battery plate on it - i.e., I could mount 2 v-mount batteries on it. Much-o more weight at the bottom for heavy camera builds.

 

That allowed me to keep the post short, and that made a BIG difference. The vibration went away, and the rig was a joy to operate.

 

Hope this helps.

 

Regards,

Scott


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#3 Nick Janssen

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Posted 12 November 2016 - 04:22 AM

Nick,
 
I'm not sure this is your problem, but I'll take a shot.
 
I had the same thing with a Zephyr when the post was fully extended. I had to extend it because I was flying a fully-decked Red One camera and there wasn't enough counter weight at the bottom of the sled to balance it without extending the post all the way. My technique was a little to blame some of the time, but one minor misstep and the thing shook like hell. 
 
It's a problem with thin-post sleds - if you extend the post very far (which you have to do with a heavy camera build), the extra mass on the top stage turns the thing into a vibrating pole. Picture a 6-foot piece of 1/2 inch PVC pipe. Put some weight on both ends (or just one), and balance it in your hand. Now, if you give it even a slight move, the ends wobble a lot. Same thing with your sled.
 
My solution was to not extend the post so much. How? Add more weight to the base to counter your top-stage weight. I put the optional battery hanger on the Zephyr base and put a double-battery plate on it - i.e., I could mount 2 v-mount batteries on it. Much-o more weight at the bottom for heavy camera builds.
 
That allowed me to keep the post short, and that made a BIG difference. The vibration went away, and the rig was a joy to operate.
 
Hope this helps.
 
Regards,
Scott

Wauw... that might me the issue indeed! Thanks for this advice Scott! I will try it today!

Sent from my SM-G920F using Tapatalk
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#4 Victor Lazaro

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Posted 12 November 2016 - 02:38 PM

Yep this looks like post vibrations. Make sure everything is tightly attached. You can also tighten a line between the matte box and your monitor yoke to stiffen your rig that might help
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#5 brett.mayfield

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Posted 12 November 2016 - 08:09 PM

I second Scott and Victor. youve got some weights behind the camera body, maybe lose those if you can and then tighten your sled up a bit.

Also, I see an Isreali arm near your monitor...whats it holding?if its hold a major accessory then I would revise. same goes more the RED monitor unless its absolutely necessary in its current configuration. get used to using the monitor up top.

The cables wont cause the issue, but try keeping cables clean and tight.


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