When you are validating the target, make sure you get the green "check" at both normal view and zoom setting.
Why is that?
Let me tell you I am adjusting my lens 50x focal length and normally I can't get the green check when making zoom for example with a 135mm or 200mm lens.
Besides I am doing AFMA, I am still having some doubts.
1.- Distance to target: All bibliography tells you must set the target 50x when focal lenght is less than 200mm and set 25x for larger focal.
So for example... for a 200mm lens I should set the target to 10meters... and for a 300mm to 7.50 meters?
To be honest, 15meters seems to be a lot for a 300mm lens.
What are your experiences with that?
2.- Trying to AFMA a zoom lens for example a 24-70 with a 7D... Do you adjust for the larger focal? You set an average between the AFMA number for 24mm and the number for the 70mm.
Any comments will be very useful to me... I have to AFMA a lot of lens with my 7D and my 5D III