The Fujifilm M Mount Adapter for X-Mount Cameras allows M mount lenses to be used on X mount cameras, such as the Fujifilm X-Pro1 and X-E1. (Please click on the Specifications tab for lens compatibility.) The adapter is designed in three parts: an aluminum mount for the body, a stainless steel mount for the lens, and an aluminum central tube. Such a design maintains a 27.8mm distance from the lens mount to the sensor, allowing thus high quality image capture. On the camera side of the adapter is a group of electronic contacts that automatically pass information to the camera based on pre-registered lens profiles. With firmware version 1.10 or later, this information is transmitted by pressing the Function button on the side of the adapter, which allows users to access the Mount Adapter Settings menu on the rear LCD of the camera. The Adapter comes with a gauge made of resin for checking the compatibility of M Mount lenses with the adapter. (Some lenses may not be suitable for the adapter even if the gauge indicates them to be compatible.) Signal Contacts The Adapter features an array of signal contacts on the camera end and a Function button on the side of the adapter. When the camera body recognizes the signal contacts of the Adapter, the "Shoot Without Lens" mode is activated automatically. Users do not have to go to the MENU screen in order to change this setting, enabling them to start shooting instantly. Pressing the Function button brings up the Mount Adapter Setting mode instantaneously. This provides ease of operation when registering a new lens to use, entering its settings or changing a lens. High Precision Design The Adapter is designed to maintain the flange back distance of 27.8mm for high precision M mount lenses with advanced planarity.