When using an ND filter directly on the camera lens versus on an anamorphic or wide-angle lens, performance differences arise due to the optical complexity and unique field of view of these specialty lenses. Anamorphic and wide-angle lenses inherently have more complex optical structures. The broader field of view can also cause uneven light distribution, making exposure adjustments necessary. Therefore, it's not an issue with the ND filter itself but rather the optical characteristics of these lenses that lead to performance variations; even the lenses that cost thousands of dollars will have this such thing but it is nothing out of ordinary and not in acceptable range.
@@FreewellGear Yeah, that's why I asked him if he used those ND filters with any of the lenses but he said only ND filters. That means those ND filters have issues. You didn't read his reply, did you?