1. An imaging apparatus for imaging art a biological object under investigation, comprising: a light source device arranged for an illumination of the object, a light detector device arranged for detection of light emitted by the object in response to the illumination of the object, an acoustic detector device arranged for collecting acoustic signals generated in the object in response to the illumination of the object, an image reconstruction device arranged for reconstructing an optical image and an opto-acoustic image of the object, and a resolution adaptation device being capable of adjusting imaging properties of the opto-acoustic image, said imaging properties including at least one of a spatial resolution and an imaging depth of the opto-acoustic image.