Sigma RCP-21 Drop-In WR CPL Filter for 300-600mm f/4 DG OS Lens Sony E
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Sigma RCP-21 Drop-In WR Circular Polarizing Filter for 300-600mm f/4 DG OS Sports Sony E Lens

SKU: SGAK3965 MFR: AK3965
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$212.00
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Key Features

  • Enhance image quality with this Sigma polarizing filter, reducing glare and reflections.
  • Achieve vibrant colors & deeper contrasts in your photos using this circular polarizer.
  • Specifically designed for the Sigma 300-600mm f/4 DG OS Sports lens (Sony E mount).
  • Durable glass construction ensures long-lasting performance for all your photography.
  • Easy to use drop-in filter design allows for quick adjustments in the field.
  • Reduce light and improve saturation for stunning outdoor shots with this Sigma filter.
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Special Order?Estimated to Ship: 09/29/2025
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Sigma RCP-21 Specifications

  • Material

    Glass

  • Compatibility

    300-600mm f/4 DG OS Sports Lens (Sony E)

  • Filter Type

    Circular Polarizer

  • UPC Code

    198983941738

Models
Sigma RCP-21 Drop-In WR CPL Filter for 300-600mm f/4 DG OS Lens Sony E

Sigma RCP-21 Drop-In WR CPL Filter for 300-600mm f/4 DG OS Lens Sony E

SKU: SGAK3965

MFR: AK3965

$212.00

Special Order

Generally ships in 7-14 days, subject to availability

Tiffen 4.5" Low Light Polarizing Glass Filter

Tiffen 4.5" Low Light Polarizing Glass Filter

SKU: TF412LLPOL

MFR: 412LLPOL

$219.00

Special Order

Generally ships in 7-14 days, subject to availability

Haida M15 CPL Magnetic Round Nano-Coating Filter

Haida M15 CPL Magnetic Round Nano-Coating Filter

SKU: HAHD4365

MFR: HD4365

$198.00

On Backorder

Order now, your card will not be charged until it is ready to ship.

Circular Filter Size-114mm (4.5")150mm
Coating-NoneMulti-Coated
MountDrop-In FrameDrop-In FrameDrop-In Frame
Polarizer TypeCircularLinearCircular

About Sigma RCP-21

A drop-in PL filter that allows effect adjustment via dial while attached to the lens. It helps reduce reflections from glass and water surfaces and enhances contrast in landscape photography.

Sigma RCP-21 Features

  • Adjustable PL filter with dial for effect control
  • Reduces reflections from glass and water surfaces
  • Enhances contrast in landscape 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

  • Enhance image quality with this Sigma polarizing filter, reducing glare and reflections.
  • Achieve vibrant colors & deeper contrasts in your photos using this circular polarizer.
  • Specifically designed for the Sigma 300-600mm f/4 DG OS Sports lens (Sony E mount).
  • Durable glass construction ensures long-lasting performance for all your photography.
  • Easy to use drop-in filter design allows for quick adjustments in the field.
  • Reduce light and improve saturation for stunning outdoor shots with this Sigma filter.

What's in the box:

  • Sigma RCP-21 Drop-In WR Circular Polarizing Filter
  • Sigma 1 Year Limited Warranty