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Have you worked with Alpha 4K "space beam/space light" accessory?

alpha 4k space light green screen hmi hmi space light

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#1 Rafael Bolivar

Rafael Bolivar

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Posted 13 November 2017 - 09:05 PM

Hi everybody

 

I am preparing a shooting as a gaffer, on a non-stage interior and I am looking for the best way to light a 6x6m. (20x20') green screen and white screen. Here is the camera configuration:

 

Red epic dragon (maybe an Hellium sensor, depending on the production department)

25 fps

1/250

ISO 800

Zeiss CP2

 

The topic of the video is a free-fall simulator demonstration.

 

We are shooting at night for day, in an area from a shopping center measuring 14m. large x 7m. long x 14m. tall (46' large x 23' long x 46' tall). There are not structures to hang on the fixtures.

On the back there is a window as big as the wall (46x46'), against a steel structure where we are going to hang a 20x20' green screen.

We have, of course, a tight budget so we cannot afford a trilite structure (stage columns...), which is far more expensive as we thought (5K€). 

On the other side, we can afford 2 articulated boom lifts, high and long enough to top light the green screen. I am thinking to hang the fixtures at 8m. (26')

 

We are using HMI fixtures to key and backlighting (3 Arrisun 2,5K), as well as 2 Skypanels S60C.

 

So... I am thinking about using 2 "K5600's Alpha 4k" with the "space beam/space light" configuration, the first at 2 meters (6,5') from the edge of the screen, and the second at 4 meters (13').

So I am wondering if:

 

1. Is it enough to evenly light the 20x20' green screen,

2. Will it have enough output to properly light it.

 

We are only doing a few shots on green screen. After that, we are going against white screen (same area). Do you think the same configuration will be enough to have a nice white background?

 

I hope my explanation is good enough. 

 

I can upload a plan if you need.

 

Thanks for your feedback!

 

PS: I apologize for my english mistakes.


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#2 Rafael Bolivar

Rafael Bolivar

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Posted 20 November 2017 - 03:39 PM

For whom might be interested, we finally decided to make it on post. 

The shot is ment to last 3 seconds, so rotoscopy is far more cheap.

Voilà!


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