The filters themselves and the magnetic ring do not have threads. However, you can insert other non-magnetic filters between the lens and the magnetic ring. 

Yes, the hunting camera comes with a solar panel with a 3m cable, the solar panel can be adjusted to suit the location and How do you get the electricity? How much capacity does the hunting camera have The product itself has a battery capacity of 7800mAh and is powered by the solar panel. Please fully charge it with the adaptor before use. You do not need to remove it often to charge it in summer and in sunny places 

Yes, but you need to contact us to purchase the bracket and extension cable separately, the extension cable is 2M 

this solar outdoor camera can not work with 12vds on a rv. 

1. The outer diameter of different diameters will be different, you can superimpose the filters, you can buy the same diameter filter superimposed (such as: 58 black soft filter, superimposed on the back of the 58 ND filter)