Cokin

Cokin Z021 Blue 80B Filter - 100mm L Series

Correct Warm Light for Accurate Color ReproductionThe Cokin Square Blue 80B conversion filter is designed to correct warm or amber light to neutral "daylight," essential for film photographers seeking accurate color reproduction. Filter Type: Blue conversion filter Correction: Corrects 3400K (i...

$44.99*
Check availability

*Price sourced from Amazon.com. Last updated:Jul 13, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Correct Warm Light for Accurate Color Reproduction

The Cokin Square Blue 80B conversion filter is designed to correct warm or amber light to neutral "daylight," essential for film photographers seeking accurate color reproduction.

  • Filter Type: Blue conversion filter
  • Correction: Corrects 3400K (incandescent) light to 5500K (daylight)
  • Size: 100mm x 100mm
  • Compatibility: Designed for L (Z) Series Holder
  • Stop Value: 1 2/3-Stop

Key Features

Use dark blue Z020 with daylight film under tungsten lights.

Use medium blue Z021 or light blue Z022 with daylight film under halogen lights.

Specifications

Series
L Series
Color
Blue
Filter Number
80B (Z021)
Size
100mm
Intended Use
Daylight film under halogen lights
Manufacturer
Cokin

Pros & Cons

👍 Pros

  • Specifically designed for correcting color balance when using daylight film under halogen lights, ensuring accurate results
  • Optimized for medium blue color correction, offering a precise adjustment for specific lighting scenarios
  • Belongs to the Cokin L Series, indicating compatibility with a range of Cokin filter holders and accessories
  • Constructed at 100mm, providing ample coverage for various lens types when used with a compatible system
  • Enhances the versatility of daylight film, allowing it to be used effectively in varied artificial light environments

👎 Cons

  • Primarily designed for use under halogen lights, limiting its application in other artificial or natural light conditions
  • May require additional blue filters like Z020 (dark blue) or Z022 (light blue) for optimal results in different tungsten or halogen light intensities
  • Requires a Cokin L Series filter holder system for proper use, which is not included with the filter itself
  • This filter is a specialized tool, meaning it may not be suitable for general photography needs beyond color correction
  • Does not provide creative color effects, focusing solely on technical color balance adjustments for specific light sources

Frequently Asked Questions

The Cokin Z021 Blue 80B Filter is specifically designed to correct the color balance when using daylight film under halogen lighting conditions, helping achieve more natural colors.
No, for tungsten lights, the dark blue Z020 filter is recommended. The Z021 is optimized for use with halogen lights for medium blue correction.
This filter is 100mm, part of the Cokin L Series, which means it requires a compatible Cokin L Series filter holder system.
This filter is intended for technical color correction to achieve accurate white balance rather than for creative color manipulation or artistic effects.
Cokin offers the Z020 for dark blue correction with daylight film under tungsten lights, and the Z022 for light blue correction with daylight film under halogen lights.