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SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)

SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
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SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
SpectrumFilter SF -3.5 B, Filterfolie 60 x 60 mm (3 Stück)
This item is discontinued. Please find accessories and technical data here.

Follow-up product: Spectrum Filter SF -3.5 B Film

Product number: KL1520

The SF -3.5 spectral filter compensates for the colour shift in blue water from 7 metres of light path and reduces the brightness by 3.5 f-stops.

KELDAN Spectrum Filters explained from Wetpixel on Vimeo.

Features:

The Spectrum Filter SF -3.5 B is designed to compensate for the light absorption of blue water colours, providing a smooth, balanced light spectrum for your camera's sensor. This greatly improves the colour rendition of your images and matches colour values to daylight for excellent results with manual white balance.

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The Spectrum filter SF -3.5 B has a compensation depth of 7m. At this depth, the filter perfectly compensates for the light absorption of the water. The camera then sees a daylight spectrum, just like when shooting on the surface.

The filter is best suited for blue water in a depth range of 6 to 20 metres. The filter has a damping that corresponds to a loss of 3.5 stops. Typically, low noise cameras that allow shooting at ISO 1600 or higher are required when using this filter.

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IMPORTANT: If you have issues with low light levels, switch to a lighter filter such as the SF -1.5 (loss equals 1.5 stops). Using a lighter filter is always a better option than using no filter!

The filter can easily be cut to the desired size. The filter's support material is a thin plastic sheet.

Three pieces of filter foil in 60x60 mm format are supplied in an envelope.

&Uml;overview:

  • There are three different filters. A lighter version with 2 f-stops loss and two variants with a light loss of 4 f-stops.
    • .
  • The -4 f-stop variant is available in two versions for blue and for green water.
  • The filters are available for filter threads in sizes 58, 62, 67, 72, 77 and 82mm as well as for the Nauticam Wetlens WWL-1 
    • .
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Technical data

for mounting on lens mounts


Scope of delivery

SpectrumFilter SF -3.5 B, filter film 60 x 60 mm (3 pieces) by KeldanLights

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Spectrum Filter SF -1.5 Film 60x60
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The Spectrum Filter SF -1.5  is designed to compensate for the light absorption of all water colors 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 -1.5 has a compensation depth of 3.5m. At this depth the filter makes a pertfect compensation of the light absorption of the water column. The camera then sees a daylight spectrum just like shooting at the surface. The filter is designed to provide optimal performance for any water color from blue to green water. It works best within a depth range of 2 to 15 meters. The filter has a damping equivalent to a loss of 1.5 stops. For deeper depth we recommend to use either SF -3.5 B (for blue water) or SF -3.5 G (for green water) The filter can be easily cut to the needed size. The substrate of the filter is a thin plastic sheet. Three pcs. filter sheets with the size 60x60 mm are shipped in one envelope.

Spectrum Filter SF -3.5 G Film 60x60
Spectrum Filter SF -3.5 G Film 60x60
The Spectrum Filter SF -3.5 G is designed to compensate for the light absorption of green water colors 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 -3.5 G has a compensation depth of 6m. At this depth the filter makes a pertfect 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 3.5 stops. Normally low noise cameras that allow to shoot at ISO 1600 or higher are required when using this filter. IMPORTANT: If you experience problems wit too low light level switch to a lighter filter  such as the SF -1.5 (loss equvalent to 1.5 stops). The use of a lighter filter is always the better option than using no filter at all! The filter can be easily cut to the needed size. The substrate of the filter is a thin plastic sheet. Three pcs. filter sheets with the size 60x60 mm are shipped in one envelope.