Export customized camera view to image sequences

Hi,

My problem is whether it is possible to export the camera view to hard drive as an image sequence. I know I can use CaptureScreenShot to do this with the default Unity perspective camera if I am right (I am a beginner). However, I want to export fisheye image here.

In particular, my problem is that I want to build a virtual 3D urban environment based on Unity 5. Then I want to place a fisheye camera inside the virtual world and then export the 2D image sequences viewed by this fisheye camera to hard drive for future computer vision algorithm development. I know the projection function of this fisheye camera, i.e., given a pixel position from the image, I can get the ray vector towards the virtual 3D environment. So is it possible to render/form this kind of image based on my own fisheye camera model? and then store the image to my hard drive?

Many thanks for the help or any related hints about it!!