Lost Alpha is a new episode of the S.T.A.L.K.E.R. series made by dezowave group for free!
These screens were captured exclusively for the russian "Stalker's Community" independent online magasine second issue.
you can download .pdf from here: Ifolder.ru
How can i set weapon view fov like that screen?
In old builds, it was in the user.ltx (and changeable through the in-game console), named "hud_fov .6" (I believe .6 is the default in the builds).