An imaging apparatus (100) for imaging an object (1) under investigation, in particular a biological object, comprises a light source device (10) arranged for an illumination of the object (1), a light detector device (20) arranged for detection of light emitted by the object (1) in response to the illumination of the object (1), an acoustic detector device (30) arranged for collecting acoustic signals generated in the object (1) in response to the illumination of the object (1), an image reconstruction device (40) arranged for reconstructing an optical image and an opto-acoustic image of the object (1), and a resolution adaptation device (50) being capable of adjusting imaging properties of the opto-acoustic image, said imaging properties including at least one of the spatial resolution and the imaging depth of the opto-acoustic image. Furthermore, an imaging method for imaging an object (1) under investigation, in particular a biological object, is described.