Purtroppo, questa descrizione non è stato tradotto in italiano, in modo da trovare a questo punto una descrizione inglese.
This mounting plate fits on the back dovetail of the NextGEN and is secured in place by three setscrews located in the mounting plate 120 degrees apart.
It is important that the back-focus distance is set as closely as possible for the NextGEN reducers, which is why each mounting plate has a unique length for every camera model. In this case it is equipped with a T-Thread and has a total length of 0.67 inches (17mm).
The backfocus distance should be known to +/- 0.04 inch (1mm) for best performance.