I was just doing a little bit of research for an upcoming trip and deciding which lens,TC and body combinations I would use and to do so referred to the camera manual on AF performance. I came up with some interesting facts which lead me to think that the manuals( which I downloaded from Canon' website) are inaccurate.
The manual suggests a 70-200f2.8 Mk2 mounted on a 7D2 would produce 45 cross-type and another 20 standard AF points.
The much more recent 1DX2 would have only 21 cross-type and 40 standard AF points. That was a surprise to me given the performance of the 1DX2.
I then looked at the performance of the 100-400 Mk2 with a 1.4TC added. According to the 7D2 manual you would have one centre point cross-type and 4 surrounding standard points. Look through the viewfinder (with the lens attached) at the illuminated points and indeed that is all you can get however, according to the 1DX2 manual you should get 1 centre cross-type and 8 standard others.In actual fact you can push the AF point around all 61 available ones so the manual is inaccurate.
Canon are certainly under selling the performance of the 100-400Mk2 on a 1DX2 and in fact I wonder if the information in the 1DX2 manual is just copied from the 1DX with no reference to the improved performance with all lens and TC combinations.
Other areas of the manual are updated but I wonder if there are more gaping errors, particularly ones that might influence future purchases of lenses in particularly.
I am reading it right am I not?
The manual suggests a 70-200f2.8 Mk2 mounted on a 7D2 would produce 45 cross-type and another 20 standard AF points.
The much more recent 1DX2 would have only 21 cross-type and 40 standard AF points. That was a surprise to me given the performance of the 1DX2.
I then looked at the performance of the 100-400 Mk2 with a 1.4TC added. According to the 7D2 manual you would have one centre point cross-type and 4 surrounding standard points. Look through the viewfinder (with the lens attached) at the illuminated points and indeed that is all you can get however, according to the 1DX2 manual you should get 1 centre cross-type and 8 standard others.In actual fact you can push the AF point around all 61 available ones so the manual is inaccurate.
Canon are certainly under selling the performance of the 100-400Mk2 on a 1DX2 and in fact I wonder if the information in the 1DX2 manual is just copied from the 1DX with no reference to the improved performance with all lens and TC combinations.
Other areas of the manual are updated but I wonder if there are more gaping errors, particularly ones that might influence future purchases of lenses in particularly.
I am reading it right am I not?
