09-18-2015, 08:29 PM
Unfortunately my EOS 6D has no intelligent macro tracking...
I am still trying to understand why DOF & light are about the same for 140mm f4 and 150mm f5.6
I tried to make 'about the same picture' (I mean the same cut/framing/crop or however I should put it into English...) with 100mm at f2.8 and with 100mm + TC at f4 (which means I had to get closer without TC), then the DOF in the pictures is about the same.
Hmm, difficult...still thinking about it.
I am still trying to understand why DOF & light are about the same for 140mm f4 and 150mm f5.6
I tried to make 'about the same picture' (I mean the same cut/framing/crop or however I should put it into English...) with 100mm at f2.8 and with 100mm + TC at f4 (which means I had to get closer without TC), then the DOF in the pictures is about the same.
Hmm, difficult...still thinking about it.