I have been flying my Mini for 9 months and almost always use an ND filter. I have never been comfortable with holding the camera while installing the ND filter. Recently I have left the ND 16 installed full time -- even when the Mini is stored in the case. During initialization startup, the camera goes through the motions fine and no error signal.
Question: Is it OK to leave the ND filter installed permanently?
Question: Is it OK to leave the ND filter installed permanently?