BMPCC underwater filming setting

Hi all,

Where I can see some 7-14mm or 8mm BMPCC underwater clips?

With that crop factor I guess that the Fisheye shouldn't be too bad.

Thanks

Hi edmond

My review is online now, but it is way too long to post here on the forums!

I've posted an example video in the sharing forum and the review can be seen at www.viewfromtheblue.blogspot.com

Cheers, Simon

Hi Simon,

Very nice report !! Thank you so much for your sharing and hard work !!!

Cheers

Edmond

Edmond, you taken yours to water yet? If so, how are you finding the buoyancy?

Yes, I have been playing with it in my pool during weekend. I took out the long carbon float arm and leave the short and fat one.

It will be just slightly negative, all together with the Ninja 2 housing, and my DIY platform.

I've just (literary) come back from the pool with my and some precise scales

-1.1790kg negative (in fresh water) with no floats

hi Edmond

Could you post some photo of your diy plate with some detail?

Hi Davide,

Hope the pictures can self explain what I did for the BMPCC and GH-3 housing.

Those platform are made from POM material.

Cheers

Edmond

Thank you Edmon you gave me a nice idea

Only problem is finding a plate of delrin, I saw only tubes and it's very expensive. Maybe PVC works the same.

Until now I used cheap chinese tripods I have a small project in spring water filming the surface form the bottom. I find them for 15€ and in spring water they last a lot but I like your design.

Byeee

Hi Davide,

Guess I am very lucky to have it ordered from China.

http://detail.tmall.com/item.htm?id=16923107827&spm=a1z10.1.w5749449-4238833051.23.s4XosX

The delrin plate only cost me US$4 for each and delivered right to my home. You can even ask them to cut into specific dimension.

Cheers

Edmond

Davide DB, I don't know if they ship to Italy, or how expensive it would be, but Online Metals stocks Delrin plate. I've used them for lots of small projects, and their service is really good.

http://www.onlinemetals.com/merchant.cfm?id=206&step=2&top_cat=181

Thank you all for your suggestion. Actually I saw that here in Italy on Ebay there are some deals: 40$ for a plate 500x500mm and 10mm thick.

I have to check in Germany, usually they have good prices on mechanical related things... of course 4$ it's a steal

What's the minimum thickness for this application? I guess 6mm or 8mm are enough...

Hi,

For mine is 9mm. I think it will be better to have 10mm.

I have made a tripod set up for my compact rig using few ultralight parts it is not difficult and works a treat

Looking at your set up you need to consider that shorter legs are actually better to avoid your rig to take off and also that whilst 3 points will always be in balance 4 won't and you may run into trouble setting it up on the bottom. A 3 legs table never wobbles a 4 legs does at the minimum misalignment

Thank you for your comment in advance.

This is not my first time to use this kind of setup. I have been using this setup to shoot underwater video for 4 years.

I know very well how good it is, to use 4 legs better than 3 legs, and a longer legs than short legs.

To my understanding, more legs, more stable. Most of the chairs we are seating have 4 legs. The dentist chair that I am seating everyday to treat my patient have 5 legs. It just more legs you have to adjust to find the balance, but once you balance it, it is more stable.

To give you some idea how good it works, you can take a look at my video below.Those magnified shoot on Harlequin Shrimp (2:50)can be so stable by using 4 legs platform to film, and so as all the other shoot.

Cheers

Edmond

Good video

That does not make any physical sense though

Chairs have four legs as you dont want to sit on a triangle as your bum is squared but usually have adjustable feet to compensate

Three point of contact always balance on the same plane four don't. Before mankind introduced levelled floors all chairs had 3 feet as they steady on an uneven floor

That is why manufacturers sell camera tripods and not quadripods

But if you are happy with the additional time to balance four legs good for you

For your information,edelkrone just release a pocket stand like this :

Quadpods are more stable and stronger but can take longer to set up.

Tripods are still stable, and are a lot quicker to work with.

You've got some stunning results Edmond, which us really all that matters