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New Housing "Airlock" Vacuum from Backscatter


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#81 E_viking

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Posted 10 March 2013 - 02:19 AM

New look on those splitfins?


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#82 ehanauer

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Posted 10 March 2013 - 06:53 AM

About 20 years ago, John Fiorda in Costa Mesa made a vacuum system for Nikonos cameras. It was small, economical, and worked great.
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#83 Steve Williams

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Posted 10 March 2013 - 01:52 PM

(European readers should be aware that corruption is evidently quite normal in the ex-colonies.  :) )

 

Please explain your insinuation John

 

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#84 John Bantin

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Posted 11 March 2013 - 12:01 AM

Please explain your insinuation John

 

Steve

You implied that because Hugyfot had taken a quote by me from Diver Magazine, my support for vacuum pump systems in housings might have been disingenuous. I get no remuneration from Hugyfot or Wetpixel or any other industry members apart from the magazines that pay me for me impartiality, which I vigorously defend.


Edited by John Bantin, 11 March 2013 - 12:03 AM.

I buy my own photographic kit. Diving equipment manufacturers and diving services suppliers get even-handed treatment from me whether they choose to advertise in the publications I write for or not. All the equipment I get on loan is returned as soon as it is finished with. Did you know you can now get Diver Mag as an iPad/Android app?

 

#85 Steve Williams

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Posted 11 March 2013 - 09:51 AM

Hey John,

I’m sure that if we were on a dive boat somewhere we’d be laughing and telling jokes and sitting on the upper deck with a cold one telling stories all night so please take my comments in that vein.  I didn’t mean to imply anything. I was attempting to answer your question.  You asked why some of your brethren in the UK “get cross” and question your motives.   You do show up on the front page of the Hugy site and you did bring up the Hugy system in a post about the Backscatter system.  It’s reasonable to question why you might do that.

 

Your statement that we colonials are somehow corrupt is really below the belt.  Our forefathers solved that issue.  For the record I personally have never taken a dime from Backscatter or any housing manufacturer.  I have made over 5000 dives (stopped counting in 93) and paid for every single tank myself.  I’m not paid by Wetpixel and the only income I receive from underwater photography is from the few images I sell.  If you have evidence of corruption I’d ask that you state it now or delete your comment.

 

I don’t want to get in a long diatribe with you partner.  We’re both too old and life’s too short to burn daylight.  But if you or anyone else disparages another member without cause I’m going to call them on it.   If you have any other comments I suggest we take this discussion off line and let the thread get back to talking about vacuum systems.

 

Cheers,

Steve


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#86 John Bantin

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Posted 11 March 2013 - 11:43 PM

Sauce for both Goose and Gander.


I buy my own photographic kit. Diving equipment manufacturers and diving services suppliers get even-handed treatment from me whether they choose to advertise in the publications I write for or not. All the equipment I get on loan is returned as soon as it is finished with. Did you know you can now get Diver Mag as an iPad/Android app?

 

#87 eyu

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Posted 13 March 2013 - 10:36 AM

Now that the volleys across the pond has stopped!

 

Can someone please tell me how do these systems prevent the aspiration of water being sucked into the housing when they are bleed to allow the housing to be opened?

 

Is there a way to drain the residual water in the valve to prevent the water from being sucked in?

 

thx, Elmer


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#88 E_viking

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Posted 13 March 2013 - 10:59 AM

@eyu:  Do you mean Waterdrops? Or Condensation?

The Vividhousing ( and I assume Hugyfot) are covered by an O-ring.

I would guess that the Backscatter type of solution could gather some small water drops. It should on the other hand be easy to blow away before bleeding the Valve.

 

 

This gives only the Condensation when bleeding the Valve. The bigger the temp diff between water and Topside the more condensation can build up at the Camera&Lense.

This might be an issue over time/years? The way to overcome this part is simply to let the Housing warm up after a cold dive before opening it.


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#89 eyu

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Posted 13 March 2013 - 11:29 AM

@eyu:  Do you mean Waterdrops? Or Condensation?

 

Water, not condensation, being sucked in to relieve the negative pressure thus allowing one to open the housing since the valve has has been submerged.  Is there a way to bleed or remove the water before opening the valve? 


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#90 E_viking

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Posted 13 March 2013 - 11:39 AM

@eyu:  I personally do not see this as an issue. 

It should however  be possible to simply blow away the residual water drops with your Lungs, before you bleed the Valve.

After rinsing it is sweetwater, anyway. I can not really see that the remaining residual water can cause harm.


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#91 eyu

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Posted 13 March 2013 - 12:45 PM

After seeing water corrode 5 pin nikonos connections and hot shoe connections I have become paranoid of either salt or sweet water entering my system.  I like the negative pressure idea to check the integrity of the housing seals, but worry about water being sucked into the housing when releasing the negative pressure.  Whatever is in the valve will be sucked into the housing when the pressure is released.


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#92 E_viking

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Posted 13 March 2013 - 01:04 PM

At the Hot shoe it is more of an issue of being exposed to Salt water and different  materials. So, it is a different issue.

 

I guess that you could reduce the amount of residual water by opening upside down ( like the Nikonos) while bleeding the Valve.

There are already a number of these systems out there and noone has complained about it so far ( to my knowledge).


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#93 davichin

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Posted 13 March 2013 - 01:49 PM

In the hugyfots, the valve is protected by a nikonos cap so it stays dry during the dive. It is really a non issue and I have never had any problem with that. As long as you dry the cap before release, you will not have any water around.


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#94 davichin

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Posted 13 March 2013 - 01:55 PM

5620492112_e52781ce9c_z.jpg


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#95 andy_deitsch

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Posted 13 March 2013 - 01:57 PM

My experience is the same as davichin's.  I've been using the Housing Sentry system since 2011 and never had a probelm with water getting aspirated inside of the housing.  It just doesn't happen.


Edited by andy_deitsch, 13 March 2013 - 04:48 PM.

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#96 davichin

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Posted 13 March 2013 - 01:59 PM

5620492576_db09ac3916_z.jpg



5620492774_0ee83b8ee1_z.jpg



5620493022_b4b39d07d3_z.jpg


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#97 davichin

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Posted 13 March 2013 - 02:03 PM

All this said, my hugycheck and alarm system quit working a month ago :(  without cause, so now I dive "unprotected"...


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#98 KirkD

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Posted 13 March 2013 - 03:02 PM

Thanks for be photos and info on the Hogy system. I wonder what is would cost you to get the system fixed?

#99 eyu

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Posted 13 March 2013 - 03:36 PM

I can see how the hugycheck will not suck in water if the cap is dried.

 

In looking at the Backscatter video it appears that the black plug serves as a cap and prevent water from filling the valve orifice.


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#100 blibecap

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Posted 13 March 2013 - 04:01 PM

The block off plug keeps salt and other debris out of the vacuum connector. The block off plug seals inside the connector but there is still a area where water can reside inside the fitting. The proper venting procedure is to dry off the housing, remove the block off plug, drain any residual water from the fitting, insert the hose and fitting that connect to the pump (this seals inside the fitting) and allow the housing to vent threw the hose pump. There is very little chance that any water would get inside the housing. 


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