Arri D-21

[Scott Dropkin]

Just thought I would ask some d21 questions since the post is already started. I am unfamiliar with this camera and just wanted to know a few things. I will be doing a one day shoot with this camera and they want to use the OB-1 recorder. How much heavier is that recorder? Also, do I need a separate down converter or is there an SD output on the body? Are the power and start/stop connectors the same as the LT? Any other hints are greatly appreciated. Thanks everyone.

 

Scott

 

 

standard Arri 2 pin power, 3 pin start/stop, SD output on camera, S-TWO OB-1 around 7 lbs

 

My linkhttp://stwo-corp.com/Products/?item=OB_1

 

Jens,

 

Perfect. Thank you so much.

[Daniel Pille]

Hi!

 

I have been asked about steadicam/2.unit on a feature next year. And now it looks like it might end up with arri D-21. I can feel it in my back just thinking about it. I have never used heavier cameras than Arri LT on the rig.

I called arri and he said it was the same as arri 535 in weight.

I don´t do steadicam mainly so I am worried this will be a bit overkill to go into.

Is it so that when using this camera on steadicam you need a extra unit for recording? I have seen some pics with a extra unit on the top back. Or can you go cable?

 

Roger

 

Hey Roger,

i have done a feature film with the Arri D21. We had to use the MEGACINE from Fraunhofer. So i had a cable between the Steadicam and the MEGACINE. We had some running shots through floors and i think there were 5 cableguys;-)))

So for running shots it will be better to have a recorder on it, but anyway, i have done the job wit the cable on me and it was ok;-)

[Jim Hurwitz]

 

1) How long a cable run can you make with these units?

 

2) either of the units that are currently in production 4:4:4 dual link capable?

 

3) I would assume that the lighter weight cable would provide less interference while operating but how resilient is it?

Does anyone know about its power draw? I would assume it is fairly nominal.

 

4) As far as the thicker hybrid cable, is it a real Steadicam option or more of a “studio” mode solution? How does the power work? Does it only power the fiber module or can it power more, like the camera or accessories? Is there a power supply on the non camera end or do you plug it into a block battery? Again how resilient is it?

 

 

Chris... lots of questions! Most of these can be answered by checking out the datasheet for the CopperHead G1, which can be found at http://www.telecast-fiber.com/Portals/42770/pdfs/ch_datasheet_4pg.pdf

 

To address them directly:

1) On the lightweight "tactical" fiber cable, you'll be limited to a maximum run of 30km. Yes, thirty kilometers. On the hybrid "powered" fiber, you can' tgo much longer than 2km. That should cover most steadicam applications... ;-)

 

2) Come see us at NAB next month!

 

3) Tactical fiber cable is military spec, battlefield-rated, and are tougher than any coax, triax or any other copper cables you've ever used. It is VERY flexible and resiliant. Power draw of the CopperHead Camera Unit is about 8 watts at 12VDC.

 

4) People do use the thicker Hybrid fiber cable with Steadicams. I'll leave it to them to weigh-in on whether it is practical or not. The Hybrid cable is not as tough as the tactical cables, but it is as robust as any coax you've used. There are two Power Supply options for the CopperHead with hybrid cable: "PowerPlus" (original CopperHead) and "PowerWafer" (original CopperHead and new CopperHead Series 3000). The PowerPlus requires an external power supply and delivers 150 Watts to the camera and accessories. The new PowerWafer uses a power supply built-in to the COpperHead base station, and delivers 95 watts to the camera and accessories.

 

Jim

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