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Balancing a positively bouyant dome


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#1 SimonQudos

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Posted 06 May 2017 - 03:02 AM

Hi all,

 

I've searched the forum and found a couple of suggestions to this problem, but wondered if there were any other suggestions available?

 

I'm a newbie when it comes to underwater photography, and have just purchased my first set up - Nauticam housing for the Nikon D7200. I also purchased the Nauticam 8.5" acrylic dome port, which I have found to be very positively buoyant when testing in the pool - the housing just flips port up as soon as its in the water which is very frustrating!

 

Suggestions that I've read about are taping wheel weights to the underside of the port, but these are not available where I live, or making a weight using an inner tube to hold shot weight which can then be placed around the extension ring.

 

I'm sure this is a problem that others have encountered.... please let me know your solutions because its driving me crazy! I just want to get in the water and start taking photos.

 

(other than Nauticam NA-D7100 housing and 8.5" acrylic dome, using sea&sea YS-110a strobes mounted on 8" & 12" arms)

 

 



#2 blibecap

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Posted 07 May 2017 - 05:21 PM

I have the same problem with a prototype 8.25" hemispherical dome. It is 3 lbs positive. What i did is drill holes in the dome shade, threaded the holes and attached two Velcro cable ties from Micro Center. It works best if the weight can be placed near the front of the dome as opposed to the back-plate. Please look ate the attached pictures and let me know if you have any questions. It is nice that the weight is removable for travel and it is a standard scuba weight. It could be a soft weight also in that was all that was available. 

Attached Images

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Edited by blibecap, 07 May 2017 - 05:23 PM.

Bill Libecap
Cincinnati, Oh
http://www.UwCameraStuff.com
Home of the Housing Sentry, the ultimate leak prevention system.

#3 SimonQudos

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Posted 08 May 2017 - 01:53 PM

Nice solution.... I'm not sure I'd be brave enough to start drilling holes in the dome shade. Me and DIY do not go well at the best of times!

 

I've now managed to source some adhesive wheel weights, so will try those... if that fails, I will be looking at your instructions again. 



#4 blibecap

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Posted 08 May 2017 - 02:15 PM

Try to determine how much weight you will need to make the dome neutral in the water because you may not have enough room for the weights.  Do not put the weights on the inside of the shade as they may show up in your picture. The other problem you have with that solution is they are not removable for transport, Over under pictures etc. 


Bill Libecap
Cincinnati, Oh
http://www.UwCameraStuff.com
Home of the Housing Sentry, the ultimate leak prevention system.