mCCR or eCCR for video filming

Totto

Hi all,
I'm planning to switch from OC to CCR sometime in the next 6-8 months.
But I can't decide whether to go for mCCR or eCCR.

I do some underwater video filming and would like comments on whether the extra task load with mCCR is pointing me to go for an eCCR.

Thanks
Tor

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PCDiver

I recommend to go for an eCCR system with a HUD. You don't want to start pushing buttons when you are filming those two walesharks mating. You want to concentrate on the subject and you also want to keep two hands on the camera.

I think shots where you ascend in the watercolumn are more difficult on mCCR because you need to use one hand to add O2. Not so with an eCCR. You just vent through the nose or around the mouthpiece and let the computer add O2 for you. The hud is then used to monitor the process.

Peter

caveseeker7

If the flow rate is properly adjusted on a mCCR there isn't all that much more to do than on an eCCR, you do have to monitor both.

More important IMHO is a HUD display that is visible at all times, maybe even a secondary alert (buzzer as on the AP Inspiration/Evolution, or Display Integrated Vibrating Alert as on the various Hammerheads).

C2Rs Ouroboros and Sentinel CCRs have displays in the back if you're diving a safety diver (alert buddy).

So if you choose a mCCR, either go with a rEvo, URM upgraded Jetsam, or a custom job (Shearwater, Hammerhead or Sub Sea Systems).

Don't know if the COPIS Meg has a HUD yet, and don't remember if the Pelagian has one at all. Both of those have the breathing bags over the shoulder, so depending of how much camera you push around that may be another consideration.

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Stefan



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offpro

ther is alot of megalodon divers in norway now..

PCDiver

OK, so you can ascend from 30 to 15 meters on mCCR without adding O2 manually? Ever tried filming a turtle that goes up for air? These are the shots that are probably more difficult on mCCR then on eCCR.

wedivebc

Just picked up a COPIS II head. It has a HUD. I think they are in production now.

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Dave....

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rogeringebo

I dive mccr and shoot video all the time. It works great!
Dive enough rebreather until you can dive mccr and film.
If you can not make that work you need to practise more.

Best of luck!
Cheers
Roger Ingebo

PCDiver

Roger,

how do you handle the type of shot that I mentioned (filming and going up at the same time, with both hands on the camera)?

Peter

decoweenie

I saw your video here, and seen Peter's (PCDiver) video.

In my amateur eyes, not sure you should be advicing Peter about videoing...

Dutchy

Starting at ppO2 of 1.0 (conservative eh?) then ascending all the way to the surface gives you a ppO2 of 0.25 which is still perfectly breathable.

I'm not advocating it as standard practise. I'm just pointing out that if you have the opportunity to make the once-in-a-lifetime-shot then you should do it. Even better you can dive down again without having to flush your loop to get rid of all the O2 an eCCR would have injected on the way down .

A coin usually has two sides....

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