Lens keeps closing

Do you have it set to bulb, it maybe haunted. just kidding.
Go to menu then Timers? AE lock and set your self timer number of shots the camera can run by itself but you have to set it

Try these procedures.

the lens on my coolpix l12 keeps getting stuck and the shutter cover will not close

Good day,

This is a common problem and sometimes can be fixed.
Please see details on my tip on how to fix this error here:

http://www.fixya.com/support/r7041378-digital_camera_lens_problems

Let me know if my tip was useful for your problem!

Regards

Needs service or repair

to open them completely simply push them with your finger. try doing so also when closing them. i have the same issue sometimes.

did you try and take the battery out and outting them back in
might be worth a try

see this site -- may help - but follow carefully
http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

batteries may be low. Dont force it unless its your only option. You could strip a gear.

very small dust particals are the reason of this problem.I m suggesting an idea but apply it on your own risk.Keep camera in off position then slightly strick with ur fingernale around the lens ring evenly.This can make the lens shutter contrct.Once the shutter closed,clean gently with a painting brush over the edges where shutter slides from.do this for several times so that any hard dust partical causing may removed.do not insert anything inside.