Securely allows the attachment of an MB-T12 mattebox to the front whilst avoiding any additional vignetting and leaving the focus ring on the HCDNA unobstructed. Great quality.

Great purchase experience. I bought things from RAF Camera before and I’m always happy. Good quality, good machined and fast processing. Thank you!

Deigned this with Raf for HCDNA and mattbox but sure it can be used for many other 86mm threads lenses that need matte box!