at 1.285717 (true 90/73.74vdeg)
Actual VFOV:
61.76786 degrees
Actual HFOV:
93.514504 degrees
^this is the 1x fov
--------------------------
at 1.377405 (80vdeg)
Actual VFOV:
66.802115 degrees
Actual HFOV:
99.068873 degrees
^this is the 1x fov
----------------------
so id assume that it does indeed change depending on the scope you use
the change in fov doesn't really matter since apex uses focal length to scale the ads sens which should make those minor fov changes feel indifferent from each other