Anonymous9 years ago000Is it possible to use this doubler with the Sigma 150/600 Sport? Will the autofocus work?Show in original language (French)acitherlet9 years ago000 Helpful answerYes you can use it, but the autofocus will not work, as it will give an f10-12.6 and it works up to f8 (painfully) depending on the camera!Show in original language (French)Comment