He specializes in capturing what he calls “the spectral domain that lies amidst the shades of black and white” and within the ethereal natural settings of the Indonesian islands. His monochromatic photographs depict tranquil scenes made somber by their loss of color: haunting images of lone rocks protruding from an empty sea or people dwarfed and enveloped by the sheer expanse of nature that surround them. The intense contrast between light and shadow in his works adds drama and significance to his otherwise very minimalist shots. Koentjoro describes himself as attempting to find “complexity in the minimalist” as he walks along the “borderlines of light and shadow, yin and yang”.