Using:
Panasonic DMC-GX1
SIGMA APO 150-500mm F5-6.3 DG OS HSM
+ Kenko Teleplus PRO 300 DG 2x AF Teleconverter
+ Kenko Teleplus PRO 300 DGX 1.4x AF Teleconverter
Using:
Panasonic DMC-GX1
SIGMA APO 150-500mm F5-6.3 DG OS HSM
+ Kenko Teleplus PRO 300 DG 2x AF Teleconverter
+ Kenko Teleplus PRO 300 DGX 1.4x AF Teleconverter