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Rosco 90 (Roscolux #90 "Dark Yellow Green") is a deep-tinted color filter sheet by Rosco for stage and film lighting instruments with approximately 13% light transmission.
Overview
"Rosco 90" in the context of gels typically refers to Roscolux #90 "Dark Yellow Green" – a rich, dark yellow-green from the Roscolux series by US manufacturer Rosco. Roscolux gels are color filters placed in front of a lighting instrument's gate or in the color frame of stage and film/TV lights to alter light color and mood. #90 is described by the manufacturer as an "alternate primary" – a green variant where higher light transmission than a pure primary green is desired.
Important distinction: The designation "90" appears in two places with Rosco. Firstly, as the gel number Roscolux #90 (Dark Yellow Green). Secondly, as a density level "90" in the CalColor system (e.g., CalColor 90 Red, 90 Cyan, 90 Magenta), where "90" signifies the strongest, approximately three-stop dense level of a calibrated color. When someone says "Rosco 90" without a color additive, they usually mean the Roscolux gel #90.
Technical Data
Information on Roscolux gel #90 (Dark Yellow Green) according to manufacturer and dealer specifications:
| Characteristic | Value |
|---|---|
| Manufacturer / Series | Rosco / Roscolux |
| Number & Name | #90 – Dark Yellow Green |
| Transmission | approx. 13 % |
| Light Loss | approx. 3 stops |
| Standard Sheet Size | 20" x 24" (approx. 51 x 61 cm) |
Roscolux gels are deeply dyed polyester/polycarbonate filters designed for use in front of hot lighting instruments. In addition to sheets, many Roscolux colors are also available as sleeves for fluorescent tubes.
Set Usage
- Coloring backgrounds, cycloramas, or effect lighting with a strong, rather dark yellow-green.
- Mood and effect lighting in stage, event, and film/TV applications, less as a technical correction tool.
- Due to the low transmission (~13%), significant light loss is to be expected – the source must be adequately powerful or placed close.
- Suitable in front of tungsten and conventional lighting instruments; maintain heat distance to prevent the gel from fading or melting.
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1. Zu welchem Department gehört „Rosco 90 (Dark Yellow Green)"?
2. Wie viele verschiedene Fachperspektiven bietet dieser Eintrag?