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Old May 31, 2005, 2:47 PM   #7
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Join Date: Jun 2002
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I doubt it's a generic problem with any TC...

The AF sensor is in the camera -> the camera 'see' through all this just like your eye would on the subjects(s) and will compensate for all this stuff - Very much like the E-TTL metering with an ND filter in front of the lens (with flash or no flash)!

Remember folks use extension tubes all the time to modify a lens focusing parameter or stack various diopter filters (myopic glass) in front of their lenses without affecting the autofocusing any :?

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