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Davide DB

Member Since 30 Nov 2010
Offline Last Active Jul 28 2015 07:12 AM
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Posts I've Made

In Topic: DPV/Scooter camera mount

28 July 2015 - 07:15 AM

I forgto to mention that I measured the buoyancy with a small digital scale (that used for weighting suitcase at the airport). Just dro the entire A7 setup, arms and lights in water with a small line and weight it.

On the adval site you get the buoyancy for one cubic decimeter....


In Topic: DPV/Scooter camera mount

28 July 2015 - 07:07 AM

Hi Davide,

What kind of buoyancy device you're using?

I just tried mount a7s + 17-35, fix 7k on a scooter but too negative with stix + nauticam carbon arms.

 

 

 

Even on my A7 setup I was not able to get a neutral buoyancy (while was ok with my GH2). At the end I bit the bullet and I removed completely the scooter inner salt water weight. 

Absolutely I do not like it. I bring with me a small lead of the same weight with a double ender, just in case...


In Topic: DPV/Scooter camera mount

28 July 2015 - 07:03 AM

I originally had the Stix floats but after 40m they shrink a lot like chewing gum. Even at 30m the loss of buoyancy is small but noticeable.

 

Here in Italy I bought a pane of this:

 

http://www.easydives...-easyfloat.html

 

Then I cut it in pieces exactly like Stix cubes. I've been using them since two years without problem even at 100m. 

Now they produce these rings already cut at the right measure and 200m guaranteed:

 

http://www.easydives...-rings-kit.html

 

I have a small piece of this: 

 

http://www.adval.it/...eggiamento.html

 

It's wonderful but very expensive. Actually closed cell high density PVC or closed cell high density PVC or polyurethane foam is very common but minimum quantity sold is a 2 square meter pane...   Maybe in some small shipyard you could have some scrap. Closed cell foam is used for filling boat decks. (be careful: at least with a density of 75 kg/m3 which bear at 13Bar).

Or maybe on your side you can find some other vendor.


In Topic: DPV/Scooter camera mount

13 July 2015 - 05:22 AM

Go for the Suex, you will be not disappointed.

 

Regarding DPV mount there was this old thread:

 

http://wetpixel.com/...showtopic=47847

 

This is my YellowDiving mount. You have to add a belt and one or two holes based on your camera:

 

 

The 3 screws on the head keep the camera in a fixed position or let it rotate while still keep it on the mount. The cons with this nice piece of kit is that if you want to mount/unmount it in the water or underwater you have to loose/tight all of them. It's not so easy especially if you gear is big. It could be difficult reaching the screws  with your finger. For this reason, usually I prefer to mount everything on the boat.

As you see on this photo of the AN-A7 two of the screws are far form reach behind the dome. I was forced to that position because the dome is larger that the housing and very near to the tripod mount hole.

 

Attached File  IMG_20150628_094830.jpg   122.88KB   12 downloads

 

You can see my GH2 on the Yellow diving mount.

 

Attached File  SECCA MISENO CON BOCIO_270113_1129.jpg   79.87KB   11 downloads

 

 

 

Iu19ukPh.jpg

 

 

Once you make your camera rig (housing + lights) nearly neutral buoyant, getting rock stable shots with the scooter is very easy. I like to keep the camera aligned with the scooter handle so I can eventually shoot while scootering. The whole rig (camera and scooter) is so stable that you can shot moving everything with one hand.

 

The only PITA is that you have to set the camera and press the trigger and then keep filming while far from it. But I become very good to stretch myself toward the housing with one arm to adjust settings :)

 

 

Attached File  _DSC2092.jpeg   194.02KB   14 downloads


In Topic: DPV/Scooter camera mount

13 July 2015 - 01:45 AM

Hi Eunjae,

 

Basically a DPV mount is an highly overpriced piece of PVC/Delrin :)

 

In my team we have both. I have the Yellowdiving because is the cheapest and the small one. 

For a hounsing like NA-Gh2 and GH3 is good. Even fot the NA-A7 is ok provided you make a hole not in the middle.

I don't think it suitable for a DSRL or even a RED camera.

 

The Suex is very expensive but it's small and has a quick release mechanism that is very useful for two reasons:

 

  • A DSRL or a RED gear is very heavy out of the water. Even with my small setup sometimes I'm afraid to put in the water my scooter with my camera on it.  With that kind of quick release buckle you can mount it once in the water very easily.
     
  • I film always with my camera mounted on the scooter. It gives you stable shootings but I agree that some shots require you to have the lowest "point of view". i.e. you cannot film a pennatula in the sand with the camera mounted on your scooter. In such cases, with a quick release buckle like the Suex you can easily mount/unmount it even at depth.

 

PS

The trick for DPV mounting is having the camera setup and the scooter neutral buoyant independently. I know that it's difficult with some camera setup but it's very important also for emergency reasons. You can keep the camera  in your hands while your scooter stays beside you neutral.

 

I do not like the single tripod hole as found in the NA-A7. While it's ok for a static tripod it's awkward to securely fix the camera on a DPV. With your arms and light the camera is exposed to big torques and it tends to rotate. On the NA-A7 I had to use a small rubber carpet between the housing and the dpv support and moreover I had to use a star lock washer like this: 

 

5480.JPG

 

Double tripod holes as found in the Nauticam FlexyTray are far more suited for DPV mounting.

 

 

PS2

I can post some photo later.