Like I said, my camera AFs fine for all pics I have tried, right down to the light level where the AF beam comes on.
So I don't think there is an issue.
Why there should be an issue between F1.x and F4, but not at F4+, I don't understand. I would have thought that light is light... how can the AF system tell between say F2 and F4?
But there
will always be an issue with low light level AF because the AF assist beam works only for near targets. To AF on a building 100m away you would need a 100W lamp
There is simply no general solution to this - for any camera. AF will never work if there isn't enough light.
Last edited by peterh337; 01-16-2011 at 04:08 PM.