The sudden jump to close angle is caused by the clipping in certain environment/towns. You can either swing the camera around to fix it or walk to a different place.
As far as fixing it on your laptop, I know some laptops have a 'scroll' option on their touch-pads, which is how you zoom the camera in and out.
Otherwise, you can go into your F11 menu and under the controls tab, you'll find the 'Zoom in' and 'Zoom out' controls which you can re-map to any keys you want.
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