Steb said:RLPhoto said:1. AF focus speed with Speedlites
Read about this issue before but have not used my Speedlite so far. Just gave it a try now... 5D3 + 16-35L Mk II + 430EX II.
I switched of the light and started to focus in complete darkness with single AF point. At 35mm instant lock at different distances between 0.5 and 4m even with the most outside point. At 16mm the outside point is far away from the assist beam light so of course this does not work. But still instant lock with the center point. As long as the AF point is within the area illuminated by the assist beam I have no problems getting a fast focus lock.
+1 I dont see AF speed issue. Now if you disable the IR focus assist beam on the flash and try to focus with the 5D3 in low light. The AF will slow down but that happens with or without the flash and is a result of the camera using a different AF algorithm to get focus lock. Doesn't seem to matter whether the flash is used or not.
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