Originally posted by Gutta Perka Or try Apples new I-****!
? I really don't understand this reference. I'm also struggling to understand why you needed a grinder if the part being removed is foam or felt. The lack of pictures and the level of language ambiguity in this thread is leaving me totally unclear on what is needed to accomplish this.
Additionally the lack of A/B comparisons at multiple focal lengths and f/stop and lighting conditions leads me to think this is a risky procedure with unknown outcome. Having the original part in original condition to restore function to original purpose seems prudent. Given the fact that some have removed the tube entirely I would think it could be replaced with a cardboard version without harm. (Painted of course).