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“palette” IR Cinematography with AU-EVA1

“palette” is a challenging work of “IR Cinematography” about how we can take an advantage of IR shooting and apply it to storytelling while having IR cut filter OFF function of AU-EVA1 on its base. For a work, which is boldly used IR shooting for a creation of a new video project “CINEMA 41 (for one)” made by Yuji NUKUI (cinematographer), his team tested it for about 1 month before the shoot, checking infrared reflectance of stock materials, and studied shooting condition.
The shooting was performed based on the following 4 steps.

Point 1

AU-EVA1 Camera Setting

IR Shooting → ON
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COLOR SETTING
MAIN SCENE 1(eV-LOOK1)
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SCENE FILE SETTING
BLACK→M.PED -15
R.PED -5
G.PED -5
B.PED -15
PEDESTAL OFFSET OFF
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GAMMA SELECT → V-504580L1
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※Color Temperature was set to 2000K in most of scenes, because Red color amount is reduced from RGB.

Point 2

IR Pass Filter

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Set an IR pass filter of 3 different pass ranges (manufactured by STC Optical & Chemical Co.) in front of the lens depending on the scene you want to shoot. The IR pass filter partially cuts the near-infrared radiation and visible radiation.

◎IRP 590
Captures infrared radiation including visible radiation area. (Interesting image can be obtained while making it easy to retouch)
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○IRP 720
Cuts visible radiation + nearly monochrome (The Infrared image)
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△IRP 850
Cuts visible radiation + narrower infrared radiation area = monochrome/high contrast
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※Frequency of Usage ◎=often used, ◯=used depending on the scene, △=seldom used (Comparative images by filters)

Comparative images by filters

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STANDARD
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IRP 590
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IRP 720
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IRP 850

After color-swap
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IRP 590
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IRP 720
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IRP 850

Point 3

IR Lamp

Use infrared ray projector to partially control the amount of infrared radiation for nighttime shooting and indoor shooting.

100W IR Lamp (custom made)

100W / Spot formulation 850nm x 2, 940nm x1 of Infrared ray lamp.
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45W IR Lamp (Panasonic)

45W / Diffusion formulation 850nm Infrared ray lamp.
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Special effect by mixing the projectors with regular lighting equipment

Point 4

Color Swap

Color grading adjustment by DaVinci Resolve 15 after color swap processing by RGB channel change function.

※In the color mode setting of AU-EVA1 camera, compared to V-Log shooting, using scene files with the adjusted parameters is easier to control the color in post.
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Infared original
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After grading
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DaVinci Resolve
※Depending on the lens, stronger flare may occur because the regular lens’ process of lens-barrel internal reflection and lens coating do not affect in the infrared shooting different from visible radiation shooting.