KELDAN SPECTRUM FILTER

KELDAN Spectrum Filters are scientifically engineered red filters based on spectral measurements of the lighting conditions underwater. KELDAN Spectrum Filters convert the ambient light into a daylight spectrum in order to restore correct colors and to optimize white balancing.

The filter characteristics are carefully adjusted not only to balance the RGB color channels but also to correct for a very smooth spectrum with excellent color rendering capabilities.

Improves color rendering with manual white balance
2 stops loss filter can be used for any water color
4 stops loss filter available for blue water and green water

Item No. 1461, 1462, 1463, 1464, 1465, 1466, 1711

SF -4 G Filter color coordinates

Available sizes

Camera Lens Diameter	Item Number
55 mm thread	No. 1711
58 mm thread	No. 1461
62 mm thread	No. 1462
67 mm thread	No. 1463
72 mm thread	No. 1464
77 mm thread	No. 1465
82 mm thread	No. 1466

KELDAN Spectrum Filters with thread -4 G

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The Spectrum Filter SF -4 G with filter thread 55mm to 82mm is designed for green water and converts ambient light to white light within a depth range from about 6 to 20 meters. Spectrum Filter SF -4 G

Spectrum Filter SF -4 G with filter thread 55mm to 82mm

Item No. 1461, 1462, 1463, 1464, 1465, 1466, 1711
The Spectrum Filter SF -4 G is designed to compensate for the light absorption of green water and therefore provides a smooth, well balanced light spectrum to the sensor of your camera. This greatly improves the color rendering of your images and adjust the color coordinates close to daylight for outstanding results with manual white balance.

The Spectrum Filter SF -4 G has a compensation depth of 8m. At this depth the filter makes a perfect compensation of the light absorption of the water column. The camera then sees a daylight spectrum just like shooting at the surface.

The filter works best for green water within a depth range of 6 to 20 meters. The filter has a damping equivalent to a loss of 4 stops. Normally low noise cameras that allow to shoot at ISO 1600 or higher are required when using this filter.

KELDAN Spectrum Filters with thread -4 G

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Spectrum Filter SF -4 G

Design

IMPORTANT