1. An ophthalmologic photographing apparatus comprising: a photographing optical system including an optical scanner configured to scan an examinee's eye with measurement light and a detector configured to detect a coherent state of reflected light of the measurement light from the examinee's eye and reference light, the photographing optical system being configured to capture a tomographic image of the examinee's eye in response to an output signal from the detector; a reference data setting unit configured to set a plurality of reference data for a follow-up, each of the plurality of reference data comprising each of photographing conditions of each of previously acquired captured images of the examinee's eye; an image capture data setting unit configured to select and combine two or more of the plurality of reference data set by the reference data setting unit to generate image capture data that comprises the selected two or more of the plurality of reference data and set the image capture data for the follow up; and a tomographic image acquisition controller configured to acquire a plurality of tomographic images of the examinee's eye by controlling the photographing optical system based on the image capture data in a collective manner under the each of the photographing conditions included in the image capture.