CTO-003 Color Temperature Orange (Warming) Filter

CTO-003 gives a gentle amber tilt—roughly a ¼-CTO step—to daylight or cool-white sources. Transmission bottoms near 43 % around 427 nm, then climbs steadily: about 60 % at 530 nm, 70 % at 570 nm, 80 % near 630 nm, and just over 90 % by 710 nm. The smooth slope trims enough blue to nudge a 5600 K fixture down to the mid-4000 K range while preserving most of its output and avoiding a heavy orange cast.

Key advantages

• Subtle ¼-CTO shift – Lowers CCT by roughly 700–900 K, great for blending daylight heads with warmer fills.

• High red throughput – > 80 % beyond 650 nm keeps brightness and skin tones intact.

• Even spectral curve – No harsh notches, so cameras see neutral colour without green spikes.

• Hard, heat-stable oxide coating – Handles high-power LEDs, HMIs, and follow-spots far beyond plastic-gel limits.

• Customisable blanks – Round, square, or free-form pieces from 5 mm to 450 mm, 0.21–3.8 mm thick, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.

Typical applications

• Film & broadcast lighting – Warm daylight panels just enough to grade smoothly with tungsten practicals.

• Stage & architectural rigs – Soften cool LEDs for more inviting ambience without deep colour filters.

• Photography modifiers – Fine-tune flashes for mixed-light sets while keeping output high.

• Museum & retail displays – Add warmth to LED spotlights without introducing damaging UV.

• Machine-vision illumination – Boost red-channel contrast for inspecting organic materials or printed codes.

Need a prototype in days or production lots next quarter? CTO-003 filters can be coated, cut, and shipped to your exact specification—fast.