Try it with these settings:
-- Interpolation in camera motion and camera snapping
-- *Rate = rate to interpolate
-- *Base = base to perform interpolation in (2.71828 for linear, must be >1)
-- *Threshold = threshold to start performing interpolation
-- Controls the speed of the zoom with the double button press
-- Controls the speed of the zoom on the wheel
-- Mouse rotation speed : scales the mouse motion to perform the camera rotation
-- Distance ranges in meters (may be influenced by selected object size)
-- This is as close to the terrain that the eye can get, unless focused on a
-- point that is closer to the terrain than this.
-- When focused onto a point on the terrain this is the ammount (in meters)
-- that the target is raised above the terrain by.
-- This is the closest that you can zoom in when you are focused at point
-- on the terrain.
-- Declination range : max angle you can look at a target from above/below
-- Pan scaling : panning velocity scaling
-- Panning speed at the default zoom height.
-- Panning speed at the minimum zoom height.
-- Panning acceleration
-- To turn acceleration off, use the following values:
-- General camera parameters
-- How wide the view is.
-- How close things can be to the camera (in meters, should not go below 1)
-- How far away we can see (in meters)
-- How much the near plane moves in based on camera height
-- This limits how far out you can zoom while focused on entities
EntityMinViewAngle=0.03 -- in radians
-- The default height or distance from the ground or target that the camera starts at.
DefaultHeight = 55
-- The default declination that the camera starts it. This is in degrees from the ground (0 would be pointed at the horizon)
DefaultDeclination = 60 --38
-- The default heading for the camera, i.e. which direction it is looking, north south etc.
DefaultAngle = -75
-- the camera model that is being used in the game
-- 0.0 means a pure homeworld camera, no panning
-- 1.0 means an eye panning camera, no target focus
-- 2.0 means a target panning camera.
-- 3.0 means a target panning camera, but with smoother panning height adjustment.
CameraMode = 3.0
-- Use this to enable/disable rotation, 1.0 means you can 0.0 means you can't
RotationEnabled = 1.0
-- Use this to enable/disable declination, 1.0 means you can 0.0 means you can't
DeclinationEnabled = 1.0
-- Use this to enable/disable auto zooming, 1.0 means you can 0.0 means you can't
ZoomLocked = 1
-- NISlet overrides