Does this filter with in front thread? Is it possible to add filters?
True Color filters have front threads for stacking filters (although filters are equipped with front threads, compatibility between all filters when stacked is not guaranteed 100%)
Is the true color filter compatible with lens caps and hoods?
True color filters are compatible with lens caps, not compatible with hoods
How to select the correct filter size?
The number on the lens or lens cap beside the "Ø" is your lens size, just select the same size filter.
What is the difference between true color VND and other VND?
True Color VND ensures that the yellowing problem is effectively solved during the video shooting process, restoring the true color of the picture
Is this filter can avoid the black "X" cross phenomenon?
There will be no dark corners with this filter on non-wide angle lenses, which may occur if the focal length is less than 24mm.