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View Full Version : Canon 400mm and 600mm F4 2x Teleconverter

jtwood
Saturday 27th December 2008, 23:26
Will Canon 400mm and 600mm F4 IS lenses auto Focus with a 2x Canon Teleconverter using a Canon 1D Mark lll
Ragna
Sunday 28th December 2008, 00:36
Yes
jtwood
Sunday 28th December 2008, 11:03
Does anyone know if the auto focus work's on all 19 points or will it just work on the centre point
paul goode
Sunday 28th December 2008, 11:10
Does anyone know if the auto focus work's on all 19 points or will it just work on the centre point

It'll just be centre point because you'll be working at f8. It caught me out regularly when I used a 2x on my 500mm f4. I'd sit there thinking the camera had packed up until the penny dropped ;)