My P-FLAT 68 looks a little different than the sketch on the Williams Optics website. Rather than having a cone shaped piece that attaches to the camera, mine is cylindrical. If I understand correctly, this may be a more recent version?
Do the same dimensions still apply to the new spacer? I can't understand how I can actually measure the dimension as given on the sketch - which appears to be to the center of a lens that is hard to reach.
I am having a little trouble figuring out how to set this flattener up to ensure correct spacing short of trial and error.
Thanks for any help you can provide,