Canon Extender EF 1.4X III Vs. Mark II coupled with 70-200/2.8L IS II

[Hjalmarg1]

Hi,
Have any of you folks used both versions of teleconverter? Have you coupled it with the latest 70-200mm 2.8L IS II? Is there any significant improvement in IQ and AF if I get the Mark III?
BTW, my camera body is the 5D Mark III.

Thanks,

 

[Maximilian]

Hi,
Have any of you folks used both versions of teleconverter?

Nope, I have only the MarkIII.

Have you coupled it with the latest 70-200mm 2.8L IS II?

Yep, I have (MIII only)

Is there any significant improvement in IQ and AF if I get the Mark III?

IQ see for yourself:
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=687&Camera=453&Sample=0&FLI=4&API=1&LensComp=687&CameraComp=453&SampleComp=0&FLIComp=6&APIComp=0

AF:
I've heard/read that there is a significant improvement with the MIII. It should be noticeably faster than the MII.

Sorry, that most just second hand info.

 

[whothafunk]

The rumor has it the 1.4x III is a lot quicker with the super telephoto mark II lenses, not the 70-200, compared to the 1.4x II.