“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

COLOR SETTING
MAIN SCENE 1（eV-LOOK1）

SCENE FILE SETTING
BLACK→M.PED -15
R.PED -5
G.PED -5
B.PED -15
PEDESTAL OFFSET OFF

GAMMA SELECT → V-504580L1

※Color Temperature was set to 2000K in most of scenes, because Red color amount is reduced from RGB.

Point 2

IR Pass Filter

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)

○IRP 720
Cuts visible radiation + nearly monochrome (The Infrared image)

△IRP 850
Cuts visible radiation + narrower infrared radiation area = monochrome/high contrast

※Frequency of Usage ◎=often used, ◯=used depending on the scene, △=seldom used (Comparative images by filters)

Comparative images by filters

STANDARD

IRP 590

IRP 720

IRP 850

After color-swap

IRP 590

IRP 720

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.

45W IR Lamp (Panasonic)

45W / Diffusion formulation 850nm Infrared ray lamp.


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.

Infared original

After grading

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.