Essential in its design and without any electrical contact, Kenko T-mount adapter allows T-mount lenses or telescopes to be installed and used with latest cameras, just by sandwiching it between the camera body and the lens.
How to install:
Unscrew all the 3 screws on the external side of the T-mount adapter with a regular flat-bladed screwdriver. While doing this operation, make sure to hold the adapter firmly with one hand as, by loosening the screws too far, the adapter may accidentally fall off.
Rotate the adapter until it aligns correctly on your lens, then screw the three external screws back in position. By doing so the T-mount adapter is now firmly installed and does not result loosen.