Double Threaded Rotating Gradient Filter

Precision-engineered rotating colour filter with dual male/female threads on an ultra-thin aluminium frame. Designed for DSLR and SLR systems, available in standard metric thread sizes (52mm–82mm). Uses optically clear, multi-coated glass with factory-applied gradient tints—no dyes or laminates that degrade over time. Each unit undergoes thread pitch verification and rotational torque calibration to ensure smooth, stable positioning. The 360° rotation mechanism locks firmly at any angle via friction-fit engineering—no screws or tools required—so gradients stay aligned during handheld shooting or panning. Double-threading supports direct mounting on lens + stacking a second filter (e.g., ND or polariser) without step-up rings. Gradient options include single-hue transitions (blue→clear, red→clear), full-spectrum shifts, and progressive saturation ramps. Intended for photographers seeking analog-style control: landscape artists use it to deepen sky tones while preserving foreground exposure; portrait photographers apply subtle warming gradients across cheekbones; urban shooters exploit colour contrast between concrete and sky—all without altering white balance or applying presets.