I have just purchased a brand new NN180. I have made many diffrent tests to find the right nodal point. I'm using a sigma 8mm with a nikon D3.
The problem is its easy to get the aim or direction of the camera lens out of alignment with the Rail, that's Yaw. The camera & lens can easily be a aimed a little to the left or right of the direction of the rail.
I have tried many diffrent things to do it correctly, but just one degree at left or right and the parrallax can't be corrected !!
I have never had such problems with my older head... a bad handmade one... but never had parallax like this !!
Would you have a technical solution ? or should I find someone who could bought my new NN180.... :'(
Thanks in advance,