Fisheye Lens view from below, looking directly up at wfcam with the telescope in its park position
Fisheye Lens view from below, looking up at wfcam with the telescope in its park position
Note on the fisheye images
The fisheye images cover a field of view of 2pi steradians - ie the lens maps the entire hemishphere
in front of the camera onto a circular image on the film. For images with the camera horizontal, the top of
the image circle is directly above the camera. For images with the camera pointed straight up, the horizon
right round the camera is just on the outer edge of the image circle.
Striaght lines become curved in fisheye images, especially towards the edge of the field.