Its been talked about ,,but still can,t decide which one to buy,,I am buying NEW,,,size is not a big factor ,just want best IQ,,in the bird forum I have seen great photos from both
Sigma 120-400 OS & 150-500 OS,,,,can you help me decide,,or is it just going to be a coin flip??
Thanks for any ideas & advice offered Ron
Don,t want a Canon 100-400