Focus: support No ROM connection on the adapterDiaphragm control of the lens is set manually.Automatic diaphragm, auto-focusing,or any other functions will not operate correctly while using this adapter.Stop-down mode will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body.Weight:10.2gSuitable for : Lens compatibility: C mount camera lensWith C-PQ adapter for Q / Q10 / Q7 / Q-S1Color:black Material : Aluminum alloyWidth of mount : inside : 25mmOutside : 51mmPackage Contents:1 * Camera AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.