/**
 * Returns the depth of field characteristics for a given lens' attributes
 *
 * @param focalLength
 * @param aperture
 * @param cropFactor
 * @param distance
 * @param imperialUnits
 */
export declare function calculateDepthOfField(focalLength: number, aperture: number, cropFactor: number, distance: number, imperialUnits: boolean): DoFResult;
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