The Mark IV has been discussed on the forum as having some issues with certain lenses. Check the Metabones site for instructions to make certain that when you use the Mark IV, you use the "Advanced" rather than "Green" mode. The 1.01 FS7 firmware update as well as the Metabones update are supposed to address some of that. In actualty, the FS7 1.01 update does not seem to affect the Metabones issues, while the Metabones firmware udate for the Mark IV and the Ultra do have some effect.
Sony rebate will give you a free Mark II which is no longer available for retail sale but which did not seem to have issues with the FS-7.
Looking forward to seeing your footage and to hearing your impressions
Ned
Yep, saw that about the Advanced but was not clear on how to do it. Folks say push a button without showing the button. Anyway, I got it to work. As I said in another thread, no flashing, slow IRIS, but usable with the 24-105/F4L. BTW, don't know if you saw this elsewhere but mine's a rental. I am one of those dang Nikon shooters so I am waiting on my Ultra F to E coming from B&H. I should do the free Mark II and sell it. May see if the firmware update will load on the rental adapter.
And no, you do not want to see my footage;-) But I will get better.
I really appreciate the help,
Robert
PS: That sensor so close to opening is a little scary. Not used to that. My HPX300a may be similar but I never remove the ENG lens that is on it.