@milandro -got it.
@cugExcellent, this is what I needed. Now, I understand much better. It is difficult to visualise the system just from the internet.
-I will be getting only 16mm and 35mm, zooms I had with my Nikon Dx 70-300, 18-70, 12-24 Tokina, and basically I used only wide angle Tokina, filter vignetting caused I shot around 14, and 16mm most of the time.
I do not care about the video, most likely, go hero will have 8K very soon, and lets see what iphone 7 will bring.
I have tested a dealer and have an offer 1500 euro for xpro 2. Which is quite correct in comparison xt1 in 2012.
-I like your prediction, Completely agree with them.