Its the same with cockpit view in any aircraft, zoom in and distance of objects on terrain increases. In the UH-1H you have larger FoV in cockpit then in externals, that's why you see less of the buildings.
You can manually increase the distances also but if you still use use wider FoV it won't matter much as the size scale is not the same with different FoV. What I mean by this, even if you increased buildings distances to 30Km, they won't look very visible as they will be very small as they will be scaled down. But if you reduce FoV in cockpit (where you lose peripherial vision) they will be larger (like in that F2 view) and then you can notice them at further distance.