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 optimise white balancing.
Shot without filter at 17m depth with ambient light only
Shot with Keldan Spectrum Filter with ambient light only
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. When using the Keldan Spectrum Filter at depth, the color coordinates will be shifted to the white light region. Therefore colours can be recorded naturally with a very high color rendering even without using artificial lighting.
Keldan Spectrum Filters are available in three different grades, optimized for three depth ranges.
The above diagramm shows the color rendering capability of the different filters versus the depth