This adapter allows you to use Leica S-mount lenses, medium format lenses from Leica, on Leica L-mount cameras. It has electronic contacts, so you can use S lenses with autofocus and aperture control. Optically excellent S lenses are now at their lowest prices, I think. On full-frame cameras, you only use the center of the lens, so you can enjoy practical image quality even wide open. This is a rare adapter that doesn't come up for sale often, so don't miss this opportunity. - Model Name: LEICA S-ADAPTER L - Included: Lens cap, body cap, tripod mount - Features: Adapter with electronic contacts - Color: Black - Condition: Almost unused Thank you for looking.