How to prevent the blue spots when using a variable ND filter? Ask Photography 02-23 877 0 How to prevent the blue spots when using a variable ND filter? submitted by /u/IMrTrippy Visit Direct Link Share: Upvote 13 Category: Photography Tags: bluefilternd You Might Also Like Does anyone know what’s wrong? Why can’t I take sharp photos with my Canon R6 Mark II? Phone vs camera?? (Pixel 8 vs Sony a 5100 with Sony E 16-50mm F/3.5-5.6 PZ OSS lens) Camera comparison? Post comment Cancel reply Save my name, email, and website in this browser for the next time I comment.