Hi all,

I'am not sure if i have a problem with my camera - HS20 EXR i have just started using manual focus in conjunction with my new NDx400 filter.

My uncertainty lies in that when i try to focus with the filter on or off the focus seems to jump around.

I have AE + AF locked in the menu or have i missed a trick somewhere down the line i understand that you have to focus the image then apply the filter or could it just be down to needing more practice or do you have to focus then apply the lock.

Any help would be great cheers.

                                         Mike.