lens recommendation for nightime hexacopter filming
 

Using the GH3 on my Hexacopter and need a good wide angle low light lens.Im looking at these

Panasonic 20mm f1.7
http://www.bhphotovideo.com/c/product/986097-REG/panasonic_h_h020ak_lumix_20mm_f1_7_ii_asph.html
Olympus 17mm 1.8
http://www.bhphotovideo.com/c/product/971405-REG/olympus_v311050bu000_m_17mm_f1_8_lens.html
Panasonic 15mm 1.7
http://www.bhphotovideo.com/c/product/1041519-REG/panasonic_h_x015k_lumix_g_leica_dg.html
Olympus 12mm 2.0
http://www.bhphotovideo.com/c/product/1041519-REG/panasonic_h_x015k_lumix_g_leica_dg.html
I dont shoot night video at this point and want to start getting some footage of buildings/ballparks ect