Yep - ran some tests while out on patrol tonight - was kinda rough cause I wasn't near port or anything to use as a good landmark, but basically it appears that the attack scope is approximately 40 degrees across, while the obs scope is about 60 degrees across (both at minimum magnification levels) - that would seem to make sense given that the obs scope is 1x and the attack scope is 1.5x, so it looks like they modeled this one about right
