I don't think i found much information on the internet with regards which lens offer full phase detection support and which only uses contrast detection.
my M3 is japan sourced, so i far i tried:
17-40mm F4 L
24-105mm F4 L
70-200mm non-IS L
Tamron 17-50mm F2.8 VC.
from my experience, the 17-40mm, 24-105mm and Tamron can offer full phase detection AF. in fact 24-105mm AF was fast enough to track large bird in flight.
The 70-200mm however only restrict to contrast detection. both 24-105 and 17-40mm are also F4 lens, so it should offer the same light to the AF sensor (unless this is transmission dependent), but the 70-200mm seems to only offer contrast detection. Any idea what is the criteria for phase detection?
my M3 is japan sourced, so i far i tried:
17-40mm F4 L
24-105mm F4 L
70-200mm non-IS L
Tamron 17-50mm F2.8 VC.
from my experience, the 17-40mm, 24-105mm and Tamron can offer full phase detection AF. in fact 24-105mm AF was fast enough to track large bird in flight.
The 70-200mm however only restrict to contrast detection. both 24-105 and 17-40mm are also F4 lens, so it should offer the same light to the AF sensor (unless this is transmission dependent), but the 70-200mm seems to only offer contrast detection. Any idea what is the criteria for phase detection?
