Our CTO Filters deliver precise color temperature adjustments by shifting light toward the warmer, amber end of the spectrum. Ideal for balancing cool daylight or LED sources to match tungsten fixtures, these filters are essential for achieving seamless color consistency in mixed-lighting environments. Beyond technical correction, they open up creative possibilities—from simulating golden-hour sunlight and candlelit interiors to adding warmth to architectural and hospitality lighting. Available in full CTO through fractional strengths like ½, ¼, and ⅛, you have complete control to achieve anything from a subtle warm glow to a deep sunset amber.

Built to the same exacting standards as all our optical filters, CTO Filters feature hard-dielectric coatings on premium optical glass, withstanding temperatures up to 450°C and meeting MIL-M-13508C environmental specifications. This makes them a permanent, reliable replacement for traditional gel filters that degrade under heat and heavy use. We manufacture any custom size or shape, and can precisely tune the filter to your exact target CCT shift—whether matching a specific LED source or achieving a unique creative effect. Share your specifications, and we'll engineer a durable, precision solution tailored to your needs.