Kowa's TSN-CM2 T-Mount Camera Adapter Ring is dedicated for use with cameras equipped with a Micro Four Thirds mount. This T-mount is intended for digiscoping applications with compatible Kowa spotting scopes that are fitted with TSN-PZ, TSN-PA6, and TSN-PA7, and TSN-PA8 digiscoping adapters.
I bought this for a telescope application where back focus is limited. Wanted a short t adapter which is what the image on BH's webpage showed at the time of purchase. Received a standard length (longer) t adapter instead which does not serve my need. Had to return item and pay return shipping. BH needs to fix their webpage for this item. The adapter otherwise appears to be fine but is not properly represented on the website.