How to solve the problem of dark angle after installing filter in super wide-angle lens

1. Switch to ultra-thin filter, which is available in the market. The effect is stronger than that of ordinary filters, and the dark corners can be ignored.

2. Replace it with a rack filter, that is, there is a shelf in front of the lens with a filter piece attached to it. Usually this kind of lens is relatively large, and there will be no dark corners.

Discard filter