Long story short, I can't use my Canon 10-22mm like I want with 2 out of 3 adapters. The strait trough adapter works fine, the LENS TURBO and one with an aperture both get blocked from snapping on by the black plastic thing on the lens. I discovered I can peel off the light grey ring around it, but the black plastic protrusion will sticks in to deep, unlike most of my other lenses.
Anyone mess with modding their lenses to fit better? Any advice? It might just be a dust block or something, but the glass in the back is inset deeper, and the plastic part seems pointless.

Anyone mess with modding their lenses to fit better? Any advice? It might just be a dust block or something, but the glass in the back is inset deeper, and the plastic part seems pointless.
