paul goode
Well-known member
Could be completely wrong but I'm just wondering if the design of the 'high precision' sensors accounts for the 40d woes with taped tcs.
With my 100-400 and 500f4 my mkIII used in landscape mode often fails to get a focus lock on thin branches and would hunt until the battery goes flat. However, in portrait mode it will slam into focus every time. Reading the easy to follow (yeah right) bit in the manual about these sensors I think that is how the camera is meant to work so its not a problem.
But is that why the 40d's wont af with a taped tc? Has anyone tried using the camera in portrait mode or even at a bit of an angle to see if its any better. Tilting the mkIII a fraction off horizontal works most of the time.
Just a thought
Paul
With my 100-400 and 500f4 my mkIII used in landscape mode often fails to get a focus lock on thin branches and would hunt until the battery goes flat. However, in portrait mode it will slam into focus every time. Reading the easy to follow (yeah right) bit in the manual about these sensors I think that is how the camera is meant to work so its not a problem.
But is that why the 40d's wont af with a taped tc? Has anyone tried using the camera in portrait mode or even at a bit of an angle to see if its any better. Tilting the mkIII a fraction off horizontal works most of the time.
Just a thought
Paul