Still a newbie, I have taken out the rd4 rotator from my nn180 and installed the NN Ultimate R10 with 2.5 static, clamp my sigma 4,5mm following the R1 pdf file set up. According to the pdf file the NPP for 2.5 degree with three shots is 3.7 for my canon. I do have parallax problem with this setting. I will have to experiment but anybody can share values with me?

Thank you