Blender problems with camera zoom

Hi. I have some problems with main camera. When I zoom in, the camera gets blocked. What should I do. How could I reset camera view?

. When I zoom in, the camera gets blocked
Blocked by what ? Show us, attach or post a link to your blend file. Are you zooming the camera lens or actually moving the camera ?

Does it look like parts of the model are disappearing as you zoom in on it? If so, sounds like you may need to adjust the camera’s Clipping setting. Select the camera and click the camera icon. Decrease the Start setting.

Steve S

Found this discussed here - http://blender.stackexchange.com/questions/644/why-does-the-zoom-sometimes-stop-at-a-point

Alt+F in object mode will reset the zoom / pivot point to the mouse location