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Rectangular 4x4 inch resin filter, neutral tint, single coated

Lee Filters

Lee Filters Fluorescent 4300K to Tungsten 3200K Correction Filter 4x4 FL43B

SKU CH-KWVE-FR1HK

Converts 4300K fluorescent light to 3200K tungsten balance for accurate colour

  • Converts 4300K fluorescent to 3200K tungsten balance
  • Single coating reduces reflections for better contrast
  • 4x4 inch resin fits standard filter holders
  • Corrects white fluorescent tubes to warm tone
  • Three filter strengths cover 3600K to 5700K sources

Purpose and user

This set of three 4x4-inch resin filters corrects fluorescent white 4300K lighting to tungsten 3200K for consistent colour when shooting on tungsten-balanced film or video. Photographers and videographers working under mixed or fluctuating fluorescent sources use them to maintain a professional, balanced look without relying on post-production fixes.

Optical performance

The single-coated surfaces reduce reflections and improve contrast, preserving image clarity while shifting colour temperature. Each filter is engineered for neutral density transmission so exposure remains predictable, and the resin construction resists heat buildup during extended lighting setups.

Included filters and versatility

The package supplies FL 3600-D for warm-white tubes, FL 4300-D for standard white tubes and FL 5700-D for daylight or cool-white tubes, covering the most common fluorescent variants. Their rectangular 4x4 format fits standard matte boxes and filter holders, allowing quick swaps as lighting conditions change on set.

Highlights

  • Converts 4300K fluorescent to 3200K tungsten balance
  • Single coating reduces reflections for better contrast
  • 4x4 inch resin fits standard filter holders
  • Corrects white fluorescent tubes to warm tone
  • Three filter strengths cover 3600K to 5700K sources

Specifications

No published specifications for this item yet.

Questions about this item

How do I mount the 4x4" resin filter in a matte box without scratching the single-coated surface?

Slide the filter into the 4x4" tray with the coated side facing the lens, keep the protective sleeve on until the tray locks, then remove it by the edges only.

When will the single coating on this FL43B filter need replacement?

The coating lasts for years of normal studio use; replace the filter only if you see visible scratches, delamination or a measurable colour-shift on a grey card.

What colour-temperature mismatch shows up first during a long shoot under 4300K tubes?

The filter is calibrated for 4300K white tubes; if the lamps age toward 3600K or drift toward 5700K the correction becomes visibly warm or cool respectively.

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