Reikan lens testing assistance
I have used this to set up my Canon 7D I do have a Nikon D800 but have not needed to use it.
In use the camera is tethered to the computer which needed to be used in conjunction with the canon software
This can cause a problem with where your computer is situated.
When I first used it I lined up the camera to shoot through a door from the room that the computer is in to use the target set up in another room and this worked quite well. To set up a telephoto lens which required a longer throw I installed the programme onto my laptop and moved out into the garden (better light anyway )
This programme and set up worked very well for me. Good luck