hauriandreas6 years ago000Will the EF 1.4x III teleconverter work with the EF 100-400mm 1:4.5-5.6 L IS on my 5D Mark IV? Or at least the AF Centerpoint?Show in original language (German)michaelköl6 years ago+110It has a lot of information about this here: https://shuttermuse.com/canon-came... All focus points are available in this case.Show in original language (German)CommentAnonymous6 years ago000Up to 61 points with Version III extenders.Comment