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AF with 1.4 extender's pins taped
I tried this technique http://www.michaelfurtman.com/taping_the_pins.htm and it works to restore the AF on my 100-400 and 300 f/4.
It's a bit slow to AF, but it does settle down.
But, something that I didn't expect was the extender didn't affect the aperture setting.
The 100-400 still showed f/5.6 at its longest length and the 300 f/4 still showed f/4. I took a couple of shots from each lens and the file info confirms it.
I thought that this technique could over ride the AF, but I didn't think it would keep the aperture from changing to a smaller number.
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