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Rectangular drop-in filter in slim aluminium frame, neutral grey glass

Nisi

Nisi ATHENA Full Spectrum FS ND 1.8 6-Stop Drop-In Filter

SKU CH-ZVYZ-Y3FEC

A 6-stop drop-in neutral density filter for ATHENA lenses that darkens images by 1.8 density while maintaining full-spectrum colour neutrality

  • Darkens the image by 6 stops for longer exposures
  • Enables wider apertures in bright light for shallow depth of field
  • Full-spectrum neutrality preserves true colours without shift
  • Optical Nano Coating reduces reflections and protects the glass
  • Lightweight aluminium frame fits the drop-in slot of ATHENA lenses

NiSi ATHENA FS ND 1.8 6-Stop Filter

This drop-in neutral-density filter darkens the entire image by six stops, letting photographers use slower shutter speeds or wider apertures in bright conditions. It is built specifically for NiSi ATHENA full-frame prime lenses that include a drop-in filter slot. Optical glass with NiSi Optical Nano Coating maintains full-spectrum neutrality and colour fidelity. A lightweight aluminium frame and supplied carry case protect the glass during transport.

Drop-in slot limits filter choices

The filter only fits ATHENA lenses equipped with the proprietary drop-in tray, so it cannot be used on standard front-thread lenses or other lens systems. Its fixed six-stop density means you cannot adjust the light reduction; scenes requiring lighter or heavier filtration will need a different filter strength. The coating resists reflections and water marks, but extreme angles may still introduce vignetting on some focal lengths.

Check lens compatibility before ordering

Confirm that your ATHENA prime lens has the internal drop-in filter slot, because the filter will not mount on lenses lacking that feature. Verify the slot is clean and undamaged to avoid trapping dust between glass and sensor. Ensure you want a permanent six-stop reduction rather than a variable or lighter option, as this model offers a single fixed density.

Highlights

  • Darkens the image by 6 stops for longer exposures
  • Enables wider apertures in bright light for shallow depth of field
  • Full-spectrum neutrality preserves true colours without shift
  • Optical Nano Coating reduces reflections and protects the glass
  • Lightweight aluminium frame fits the drop-in slot of ATHENA lenses

Specifications

No published specifications for this item yet.

Questions about this item

Which NiSi ATHENA Full Spectrum FS ND drop-in filter density should I choose for my ATHENA lens?

The FS ND 1.8 provides a fixed 6-stop reduction, darkening the entire image so you can use slower shutter speeds or wider apertures without changing exposure.

What does the 1.8 density value mean when the filter is mounted in an ATHENA lens?

A density of 1.8 equals a 6-stop light loss, letting you extend exposure times or open the aperture by six full stops while keeping colour fidelity intact.

How does the drop-in filter interface work with ATHENA lenses and what does it limit?

The filter slides into the dedicated drop-in slot on NiSi ATHENA full-frame prime lenses, so it only fits that specific lens series and cannot be used on other filter threads or holder systems.

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