I have a Canon T1i and looking to buy a Sigma 8 mm Fisheye Lens for 360 x 180 spherical panoramas. Since this is a crop sensor camera will I be able to complete the full 360 with just 1 row of horizontal pictures (0 degree elevation), 1 top and 1 bottom? I'm also looking into purchasing a Nodal Ninga. Will I be able to use the NN3 if I upgrade to a Canon 5d (without a battery grip), or will I need the NN5?