well, shoot close up and wide.. with interesting angles... it's like an interest lense... as long as it holds your interest, should play with it like shooting something very minute with a vast horizon... I think the EYES ON CANON III has a very nice pic of the shot from a EF15mm Fisheye ^.^
Also.. pardon my ignorance but what's the diff btwn a non-diagonal and a diagonal fisheye lens?
Diagonal fisheye is 180 degrees across the diagonal field. Full frame is a true 180 but produces a circular picture. On a 1.6 crop some of the top and bottom will be cut out but the round sides should still be there.
It's a D60, right? So can manipulate digitally lor.
*Time to make another shameless plug for Panorama Tools. Helmut Dersch should pay me....*
Download the software from the link. Install into PS plugins directory.
This is the original "wide angle with bad barrel distortion" picture you get with a fisheye on a D60:
This is the rectilinear version (notice the straight lines are straight). Use the "Adjust" function of Panorama Tools. It looks like it was taken with a wide angle lens costing twice as much as a fisheye:
This is the fisheye version. Yes, the FOV is not truly 180 degrees, but few people can tell. Use the "Remap" function of Panorama Tools. Looks like an 8mm fisheye, without the cropping of the top and bottom you get with a D60: