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Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue

: Rosco Roscolux 20 x 24in. Gel Sheet- Pack of 5 (69 Brilliant Blue) : Camera & Photo. : Rosco Roscolux 20 x 24in. Gel Sheet- Pack of 5 (69 Brilliant Blue) : Camera & Photo. (5) 20 x 24" Gel Sheets 。 Color:R69 Brilliant Blue 。 Roscolux is comprised of two types of plastic. More than 65% of the line is made from co-extruded polycarbonate plastic. The remainder of the line is deep dyed polyester. How Filters Work: Filters create by subtracting certain wavelengths of color. Thus, a red filter absorbs blue and green, allowing only the red wavelengths to pass. The process is subtractive, not additive, so the light source must emit a full spectrum. The Rosco swatchbook provides detailed information on the spectral energy curve of each filter. The curve describes the wavelengths of transmitted through each filter. For example, Supergel 342 transmits approximately 40% of the violet and blue energy of the spectrum and 75% of the orange and red energy. It absorbs all energy in the yellow and green range. Durability: The life of filters depends on many variables: the color, the instrument and lamp used, the dimmer level a filter generally runs at, and the amount of time the light is running. For these reasons it is impossible to assign a "life" for each filter. However some basics knowledge and experience can help with estimates. Dark green and dark blue filters usually burn out the fastest because they absorb the most infrared energy. Absorbing the extra infrared energy causes the plastic to reach its melting temperature faster. When darker filters are needed try choosing filters that transmit high amounts of the 700 nm range. To prolong the life of a filter, align your ellipsoidal lamp to a flat field focus. (Get rid of the hot spot.) You can increase the distance between the lamp and the filter by using a top hat or barn door. 。 。 。

Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue
Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue
Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue
Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue
Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue
Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue

Gel Sheet Pack of 5 Rosco Roscolux 20 x 24in 69 Brilliant Blue

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