Neutral Density Filters

ND filters attenuate light equally within the visible spectrum.  Ideal tool when thumb rule that exposure Time = 2xframe rate-1 is still too bright with given F-stop. Maintaining a low F-stop for gaining a small depth of field these filters are used for control of bright day exteriors. They, therefore, allow more widely opened apertures. 

Graduated neutral density filters are used to darken an overly bright part of a scene, like a sky, and lighten the foreground. They bring an overly bright part of a scene into the dynamic range of the sensor.

Our Rhodium FSND filter (Full Spectrum Neutral Density) attenuate light equally within the wavelength range from 350-1000nm including UV- and near IR-light. This is of particular importance to avoid IR light pollution resulting in unwanted purple and/or violet color artefacts in dark areas of the frame. Additionally, we attach a great emphasis on color consistency to allow easy color grading, all shots, filtered, or unfiltered can be graded in the same way. This is important specifically for the critical color standards of 4K, 6K, and 8K resolution cameras and the short turnaround times in today’s post-production processes.

RHOdium® FSND


  • Control-neutral.
  • Full spectrum ND 350-1000nm.
  • Eliminate IR pollution for digital sensors.
  • No blue shift even for short focal length.
  • Available in 10 stops from 0.3 – 3.0.
  • Density consistency from filter to filter.

RHOdium® FSND Graduated


  • Color-matched.
  • Full spectrum ND 350-1000nm.
  • Follow the natural gradient of the sky.
  • Hard and soft edges version available.
  • Eliminate IR pollution for digital sensors.
  • Available in 5 stops from 0.3 – 1.5.

Neutral Density


  • Traditional Dyed Absorptive NDs.
  • Enable even exposure in an unbalanced lighting situation.
  • Helps control the amount of light reaching the sensor without depending only on the lens aperture.
  • Available in 8 stops from 0.15 – 2.1.

Neutral density Graduated


  • Traditional Dyed Absorptive NDs.
  • Balance exposure within a scene.
  • Available in 4 stops from 0.3 – 1.2.

True-Match Vari-ND®


  • Variable ND filter.
  • 10 stops attenuation of light control.
  • Smooth rotating rings. 
  • Clear marks for choosing strengths.
  • With no blue color shift at maximum density.

Technical Specifications


SizesThicknessGlass Type
Neutral Density Graduated4 x 4“
4 x 5.65“
4 mmWater White Precision
Optical Glass
Neutral Density4 x 5.65“
6.6 x 6.6“
4 mmWater White Precision
Optical Glass
RHOdium® FSND Graduated4 x 5.65“
6.6 x 6.6“
4 mmWater White Precision
Optical Glass
RHOdium® FSND4 x 5.65“
6.6 x 6.6“
4 mmWater White Precision
Optical Glass
True-Match Vari-ND®M77
M82
4 mmWater White Precision
Optical Glass

Filters in Use


Without Filter


Without Filter


Without Filter


Vectorscope at 5x magnification RHOdium® FSND 0.3


Without Filter

Neutral Density Graduated


Neutral Density 


RHOdium® FSND Graduated


Vectorscope at 5x magnification RHOdium® FSND 3.0


True-Match Vari-ND®


RHOdium® FSND filters in use by Ceproma S.A.

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