Zoe Liu

Hi Frans, Thanks very much for the amazing tool you created! I've been trying to use the focus test chart to evaluate my camera. I was able to use the a4 sized target to get some results. However, I run into "Insufficient targets detected" when I replaced it with the a3 sized target. I've tried to adjust the distance between the camera and target but had no luck. Would you mind explaining more about the error? Does it mean the actual focus is out of the target? And, how far away should I place the...