photoninja1 wrote:
I had a similar problem with lens calibration and I found that: 1. some lenses need a bolder pattern to focus on so I just made a white board with a big, taped, black X and it worked well. There was no need for a fancy chart, and the X is free!
2. focusing using a center spot sometimes failed, but using a small pattern of focusing points worked very well.
Just got a response from LensAlign and they agree with you. They recommend that I purchase their new, "large focus target". This makes sense since (should have mentioned this earlier) I am trying to tune a 600mm lens and it requires some distance to the target.
Thanks for your input.