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Show me your GH5, How you trim your buoyancy?

Panasonic GH5 buoyancy

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#1 gearbow_36218

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Posted 16 April 2018 - 04:48 AM

I'll upload a picture of mine today.  I am a bit negative with my rig set-up.  I have two options so far.  One with the floats going straight across the top of the camera (4x) other with the floats on the arms.  Any of you go from Salt to freshwater.  how do you compensate.  What do you do for  your monitor.  can you adjust trim in the water.  Adjust arms position to have the camera float in a different orientation? 

 

I can't help think a good engineering choice would have been give the option to have buoyancy built into the handles.  No? Your thoughts? 

 



#2 thetrickster

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Posted 17 April 2018 - 10:46 AM

I have:

Between the handles
2x Nauticam 90x170mm

Then from each handle
2x 90x220mm floats (so 4 of these)
Reason. Lights are 2.4kg negative!

On the WWL-1 I have the buoyancy collar also.

It’s a little positive now, waiting to get it dialled in with tyre weights (come in 5G blocks) but double Enders are a good quick easy way to get your housing balance while underwater.

Rather have it positive and add to it than negative.





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#3 Atobit

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Posted 17 April 2018 - 11:28 PM

Lights are 2.4kg negative!


What lights do you have that weight 2.4kg wet?!!?


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#4 thetrickster

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Posted 17 April 2018 - 11:30 PM

What lights do you have that weight 2.4kg wet?!!?


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4x ScubaLamp V6K Pro (-540g each) + clamps


Regards, Richard

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#5 Atobit

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Posted 17 April 2018 - 11:56 PM

Sorry to pollute the topic.

Keldan can start to worry at 750Euro/piece.

Can you get spare battery, how much they cost?



#6 thetrickster

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Posted 18 April 2018 - 12:22 AM

Sorry to pollute the topic.

Keldan can start to worry at 750Euro/piece.

Can you get spare battery, how much they cost?

 

PM'd you


Regards, Richard

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#7 ChrisRoss

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Posted 19 April 2018 - 05:00 AM

You want your buoyancy above the camera so it's not trying to flip  to being above it and in line with the centre of gravity in the vertical plane so the camera does not want to tip forward or back.   If you have a dome port you probably want to move the buoyancy back a little to counteract the tendency for the port to float up.  Be good to see a picture and know how negative you are.

 

A GH5 housing would be similar to an EM-1 MkII housing and displace about 2-3 l of water.  If it were 3l then it'd be negative by about 75g in fresh



#8 thetrickster

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Posted 19 April 2018 - 10:06 AM

Here is my current setup

a2d1b1a6cb5fbdf7576954eab16be25b.jpg

866ce5d97ee1779075c3c6cde2c3300b.jpg


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Regards, Richard

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Camera Rig: Nauticam Lumix GH5/GH5s, 14-42mm II, WWL-1, Atomos Inferno, 48,000lm of artificial sun.

www.richardwait.com


#9 Atobit

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Posted 19 April 2018 - 02:53 PM

That’s really an impressive setup.
The Nauticam arms seems oversized compare to the lights. They looks so tiny!
Overall it looks an heavy system on land. Shouldn’t be easy on the boat, the boat operators might charge you two seat, one for you and one for the camera system. LOL!

Did you use the same arms setup with the Keldan lights?

#10 thetrickster

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Posted 19 April 2018 - 09:35 PM

That’s really an impressive setup.
The Nauticam arms seems oversized compare to the lights. They looks so tiny!
Overall it looks an heavy system on land. Shouldn’t be easy on the boat, the boat operators might charge you two seat, one for you and one for the camera system. LOL!

Did you use the same arms setup with the Keldan lights?


No the Keldans were lighter. (Only negative 0.15kg each) these ScubaLamps are -0.540kg each) presume due to the dome providing some lift. So had to go with the jumbo floats. It’s (if my calculator and scales are right) is now positive a little. But as said can dial that in with stick on tyre weights.

I need to refine the setup a little for transport and handoff (it’s heavy...)

90469928e254c0fd39b0f4b955e1e6f0.jpg

But it goes ‘smaller’ once you fold it on itself.

Will get some of those quick release ball mounts you can get, so I’m able to remove the lights before handing it off


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Regards, Richard

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Camera Rig: Nauticam Lumix GH5/GH5s, 14-42mm II, WWL-1, Atomos Inferno, 48,000lm of artificial sun.

www.richardwait.com


#11 Atobit

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Posted 20 April 2018 - 01:33 AM

Do you mean the Ikelite handle quick release system? Can it be adapted to the Nauticam?
Actually it would be nice!

Can you explain what is your tyre weight system?

Cheer
Claude


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#12 thetrickster

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Posted 20 April 2018 - 02:29 AM

Do you mean the Ikelite handle quick release system? Can it be adapted to the Nauticam?

 

I'm thinking these :

 

https://www.carbonar...6808286185.html

 

Can you explain what is your tyre weight system?

 

 

At your local garage, they have to balance your car wheels, they use stick on weights, in 5g or 10g blocks. You can use these anywhere on your camera housing, arms etc to get the weighting just right

 

l_tw560.jpg


Regards, Richard

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Camera Rig: Nauticam Lumix GH5/GH5s, 14-42mm II, WWL-1, Atomos Inferno, 48,000lm of artificial sun.

www.richardwait.com


#13 Atobit

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Posted 20 April 2018 - 02:39 AM

Thanks Rich!

Great ideas here!

Where will you put the quick release? At the housing or lights side?


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#14 thetrickster

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Posted 20 April 2018 - 02:49 AM

I think...(still thinking... :)

 

the two lights in to the triple clamp, with one end of the quick release system in there too, then the other end of the quick release on the end of the last float arm (it does mean the need for yet another normal clamp to attach it thou...)

 

But maybe having it on the housing side, and having both float arms and lights removable might be better...

 

Will order a couple and have a play I think..


Regards, Richard

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Camera Rig: Nauticam Lumix GH5/GH5s, 14-42mm II, WWL-1, Atomos Inferno, 48,000lm of artificial sun.

www.richardwait.com


#15 Atobit

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Posted 20 April 2018 - 03:29 AM

Both way as there conveniences.

Some thought about the system: I’ve at there website, it seems to have a ‘click’ system that need a push to the button for the release. I’m just wondering if it’s not too risk. If you accidentally push the release button underwater when manipulating the lights...bye bye the lights!
Hopefully the release spring is not too soft.



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#16 thetrickster

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Posted 20 April 2018 - 03:32 AM

If you accidentally push the release button underwater when manipulating the lights...bye bye the lights!
Hopefully the release spring is not too soft.


Good point! Will await their delivery and have a look



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Regards, Richard

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Camera Rig: Nauticam Lumix GH5/GH5s, 14-42mm II, WWL-1, Atomos Inferno, 48,000lm of artificial sun.

www.richardwait.com


#17 Robotten-usa

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Posted 22 April 2018 - 06:40 PM

Just lurking and learning...but have a question?  With the double lights on each arm aren't you creating a huge hotspot?  Thanks, Robotten



#18 Atobit

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Posted 22 April 2018 - 10:17 PM

Maybe everyone knows already but for the one who don't, here is the link of Inon website where they list all their products (and more) underwater weight:

http://www.inon.jp/p...ight_table.html

 

Very useful to estimate you buoyancy need.

 

Just as suggestion if it doesn't exisit somewhere else, Wetpixel could open a section where we could list all underwater camera/photo equipments underwater weight.



#19 TaxiDiver14

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Posted 23 April 2018 - 09:43 PM

I think...(still thinking... :)
 
the two lights in to the triple clamp, with one end of the quick release system in there too, then the other end of the quick release on the end of the last float arm (it does mean the need for yet another normal clamp to attach it thou...)
 
But maybe having it on the housing side, and having both float arms and lights removable might be better...
 
Will order a couple and have a play I think..

Less thinking ang more DIVING

#20 sideways

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Posted 27 April 2018 - 07:02 AM

Good looking set up!  Man...that looks like some serious flotation!  I'm heading out for my GH5 inaugural trip in 3 weeks to Cozumel. I have the Ultralight foam sections for flotation.  Guess I'm gonna have to bring some extras if the unit is that negative.

 

I'm kicking myself for not seeing the obvious with regards to your dual lighting per arm set up.  I was thinking If I wanted to have both my strobes and vid lights I would have to run 2 arms off my 3 way clamp.  When in reality I can just put them side by side like yours...........DUH!!!!!   LOL  Thanks for that!


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Lumix GH5, Nauticam GH5 housing, 2x Sola 1200 lights.

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