Great panos. I haven't tried to stitch a pano together. I just use the Sigma and crop to size. I know I lose resolution but a long as I can print 36"x12" I'm happy.
Nikon D600, Nikon D80, AF-S Nikkor VR 18-55mm F/3.5-5.6G DX, AF-S Nikkor VR 55-200mm F/4-5.6G ED DX, AF Nikkor 50mm 1.8D,
AF-S Nikkor 18-105mm f/3.55.6 G ED VR DX, AF-S Nikkor 70-300mm f/4.5-5.6 G ED VR, AF-S Nikkor 24-85mm f/3.5-4.5 G ED VR, AF Micro Nikkor 105mm f/2.8 D, Sigma 150-500mm f/5-6.3 APO DG OS, Sigma 10-20mm f/4-5.6 EX DC HSM, Quantaray AF LD 70-300mm F/4-5.6 Tele-Macro(1:2) , Nikon SB 800, SB 600, Expodisc