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Autofocus

Chevi
New Contributor

I intend to use the Canon 100-400 Mk11 with a 1.4 tele converter, will the AF work ok? (using a Canon 7D Mk11)

2 REPLIES 2

cicopo
Esteemed Contributor

It does work but most likely center AF point only and it will be a bit slower.

"A skill is developed through constant practice with a passion to improve, not bought."

ebiggs1
Forum Elite

"Works" is a relative word here.  It probably will work but it will not work well.

 

Have you considered, you already have a tele advantage fo 640mm with that lens.  Maybe the only place where a EF, or full frame, lens has an advantage is on a crop body.  640mm is going to be a challenge to deal with.  Nearly 900mm is really tough. Strong tripod.  Everything has to be right for the shots to be worthwhile.

EB
EOS 1DX and 1D Mk IV and several lenses!