There is no electrical connection on the ring so diaphragm control of the lens is set manually.
It allows focus to infinity.
Install, remove and operate lens smoothly.
Smooth surface smooth surface eftless mount, fine made to be lightweight and strong.

Size Item: 6 * 6 * 3cm / 2.6 * 2.6 * 1.0in
Weight Item: 74g / 2.6oz
Package Including:
1 x Lens adapter
Thanks for your understanding.