mCCR or eCCR for video filming

Totto

Thanks all for your views.
Before this thread my mind was set for mCCR. I think it still is...
But will see, think I need a try dive....

Tor

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opimoby

Hi there
I recently purchased a APDiving Evolution ECCR particularly because I am an underwater film maker and the ECCR is perfect as you can concentrate on your subject and still be aware if there is a dramatic change in your PPO2. I also am extremely aware all of the time of my partial pressures but I can tend to relax a little and let the auto system take over when I am distracted filming. The alarm barking in your ear makes you very aware of any changes.
cheers
Ross

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silentscuba

The new Hybrid rEvo would work very good for Pictures and Filming. It is an mCCR with an eCCR as a backup. It has constant flow O2 and you can set a low PO2 setpoint that will kick in the solenoid if your PO2 drops to low.

I feel this is the best of both worlds.

Good luck on your choice!!!!

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PCDiver

Hey Tor,

is most of your filming deep (40+) or shallower. At depth mCCR is certainly a viable option since deep depth changes do not affect PPO2 that much and you can go a long time without adding O2 manually. 1.2 bar at 40 meters is a lot of O2 to metabolise and the leaky valve will add O2 as well.

If most of your diving is not soo deep an eCCR makes more sense.

PC

caveseeker7

PCDiver, the OP asked about mCCR specifically.
My point was that a properly adjusted mCCR isn't as much "work"
as some people seem to believe, although you do have to add O2
of course. But we're talking about brief squirts here.

For filming I'd go with a solenoid, too.

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Stefan



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PCDiver

Stefan, are you sure? "But I can't decide whether to go for mCCR or eCCR"

Ben Field

I shoot video on almost everydive (on an amature basis) on CK (MCCR) with Shearwater GF and HUD.

Up until the '07 season I was using the regular Manual add valve with no real problems, as you're tracking your PPO2 via displays, HUD and in your head mentally you can plan your shots around when you need to inject O2 if necessary but at a set depth its no issue what so ever.

Filming while ascending is no issue, either bump the PPO2 first, allow it to drop (I don't bother maintaining setpoint on ascents anyway, just returning to it for stops, it makes no sense) or if necessary suck off the adv and top your loop up with breathable DIL.

This is year I've been using a SNOG valve but as these aren't available I can't really reccomend it, having said that when ascending with a shotline or DSMB in one hand, camera in the other, a stage under each arm and a scooter floating around while trying to film.... hands free O2 and DIL is bliss, from what I've seen with my ECCR buddies it may even be easier than relying on an ECCR and I think its faster as well.

Just IMVHO,

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Dave O

In any CCR, it’s VERY tough to maintain neutral buoyancy during an ascent while trying to keep the camera still, and concentrating on a shot. I'll admit, that’s beyond my capability. BTW, you also have to dump your BC during that ascent from 30m to 15m. (Yes, I have several clips of turtles going up for air.)

I’ve been shooting some video on mCCR. Here are some thoughts:

I don’t have an HUD, but I’m sure it would be a HUGE benefit.

With the flow rate set properly, I only need O2 additions every 10 minutes or so. If I’m willing to let it drop below 1.0, then it’s even longer. Unless it’s a long video clip, there is no issue.

If I expect to be distracted for a few minutes by a clip, then I pump in a shot of O2 in advance. (This is true of any activity on mCCR.)

If I’m shooting shallow, then my loop is mostly O2 anyway, so again there should be little issue.

Once the camera is rolling, I only need one hand to hold it. This leaves my left hand available to add O2 if necessary. (This stems from OC days when I had to add/dump while shooting.)

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Mark Chase

rEvo hybred.

Let the electronics run the show, the back up MCCR drip feed 02 will keep you alive longer and give you more chance to spot the fault.

ATB

Mark Chase

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gerstl_ossi

For filming I prefer eCCR. Especially in shallow water it gives more security. A normal filming scenario for example ......red see, deep 18 meter, visibility more than 25 meter. You see a big shark, manta ore turtle 20 meter from you. There is a little current, not to much, but with the rebreather, the video-light, the video-camera you have just to work a bit harder to come closer. You are at 10 meters from this nice shoot, you start the video-light, correct the angle of them, because before you made a macro shoot to a small fish, you correct the video-camera settings, focus, w-balance.... and start it. You come closer 7 meter, but the fish or turtle moves from 20 to 15, 12, 10, you are concentrated to the viewfinder and the buoyancy .... only a bit closer for the perfect shoot, olny some more seconds than....uuuuuups forgot to check the PPO2 on the mCCR. That's only a example, but I'm sure eCCR is better for the video freaks. mCCR works fine too, with a hud and for deep wracks, caves - filming.

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