Re: Canon EOS-1D X Firmware Update Addresses f/8 & Red AF Points in AI Servo
Using the 1.4x will yield better optical quality than the 2x, and also with an f/4 lens and the 1.4x you have 21 cross-type AF points and 40 more single-line points, whereas with an f/4 lens and the 2x you have 1 cross type and 4 single-line points.
So, budget permitting, having both makes sense to me.
JR said:Cool! This is great news! I almost bought the 1.4x III extender earlier this week because I was afraid the 2x extender would not work with some lenses on my 1DX. Now the choice is simple! I will get a 2x extender.
Using the 1.4x will yield better optical quality than the 2x, and also with an f/4 lens and the 1.4x you have 21 cross-type AF points and 40 more single-line points, whereas with an f/4 lens and the 2x you have 1 cross type and 4 single-line points.
So, budget permitting, having both makes sense to me.
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