Screw In VND Filter for iPhone 15 Pro/Neewer Cage

[dgbarar]

Hi All:

I am attempting to find a thin, screw in 67 mm VND filter for iPhone 15 Pro and Neewer rig that does not vignette the 13 mm lens.  This is what I have tried:

• K&F 72 mm and 67 - 72 mm step up ring.  This has a thickness above threads of 12 mm and vignettes the 13 mm lens.
• K&F 67 mm.  This has a thickness of 7.3 mm and vignettes the 13 mm lens.

Any suggestions?   Irix produces a 2-5 stop VND that is only 4.7 mm thick.  Has anyone tried to see if it vignettes?

Thank you in advance.

Don Barar