Sigma RND-21 Drop-In WR VND Filter for 300-600mm f/4 DG OS Sports Lens L Mount
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Sigma RND-21 Drop-In WR Variable Neutral Density Filter for 300-600mm f/4 DG OS Sports Lens L Mount

SKU: SGAK4969 MFR: AK4969
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Key Features

  • Achieve stunning long exposures with this Sigma variable ND filter, 1-7 stops.
  • Maintain image quality in bright light; Sigma's ND filter reduces light effectively.
  • Enhance your 300-600mm f/4 lens with a dedicated drop-in neutral density filter.
  • Control depth of field in video; this variable ND filter offers smooth adjustments.
  • Enjoy worry-free shooting; water repellent coating protects this durable ND filter.
  • Get creative with motion blur; this Sigma ND filter is easy to use for unique effects.
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Temporarily On Backorder?Expected Availability: 10/2025
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Sigma RND-21 Specifications

  • Compatibility

    300-600mm f/4 DG OS Sports Lens (L Mount)

  • Filter Type

    Variable Neutral Density

  • Exposure Reduction

    1 to 7-Stop

  • Size

    Dedicated

  • UPC Code

    198983941769

About Sigma RND-21

A drop-in variable ND filter that allows effect adjustment via dial while attached to the lens. It enables up to 7 stops of light reduction to achieve slower shutter speeds without excessive stopping down, making it ideal for panning shots in motorsports photography.

Sigma RND-21 Features

  • Drop-in variable ND filter for 300-600mm f/4 DG OS Sports Lens
  • Adjust effect via dial for up to 7 stops light reduction
  • Perfect for panning shots and motorsports photography

Warranty Information

This product has a limited warranty of 12 months for parts and 12 months for labor.

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Key Features

  • Achieve stunning long exposures with this Sigma variable ND filter, 1-7 stops.
  • Maintain image quality in bright light; Sigma's ND filter reduces light effectively.
  • Enhance your 300-600mm f/4 lens with a dedicated drop-in neutral density filter.
  • Control depth of field in video; this variable ND filter offers smooth adjustments.
  • Enjoy worry-free shooting; water repellent coating protects this durable ND filter.
  • Get creative with motion blur; this Sigma ND filter is easy to use for unique effects.

What's in the box:

  • Sigma RND-21 Drop-In WR Variable Neutral Density Filter
  • Sigma 1 Year Limited Warranty