The adapter consists of an aluminum mount for the body, a stainless steel mount for the lens, and an aluminum central tube. This construction enables an accurately-maintained distance of 27.8 mm from the lens mount to sensor, which is crucial for delivering high quality and high resolution images.
The camera side of the M-Mount Adapter features electronic connections to automatically pass information to the body 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 M-Mount Adapter Settings menu on the rear LCD.
While attached, the adapter still allows use of the Hybrid Multi Viewfinder. The Electronic Viewfinder (EVF) and LCD monitor both offer a 100 percent field of view, and the Optical Viewfinder (OVF) displays a bright frame corresponding to the focal length in use.
The adapter allows users to create and fine tune lens profiles through the X-Pro1’s Mount Adapter Settings menu. Up to six lenses can be profiled. There are four pre-sets for 21 mm, 24 mm, 28 mm and 35 mm lenses, plus two optional settings for additional optics.
With the adapter attached, profiles can be user-defined, based on distortion, peripheral illumination and colour shading corrections.
Three levels of distortion correction are also available to combat barrel distortion on wide-angle lenses, and pincushion distortion on telephoto lenses. Users can select from strong, medium or weak correction, or simply turn any correction off.
Peripheral illumination controls the amount of darkening at the four corners of an image. Eleven levels of correction can be applied from +5 to -5 (including “0”) with users given the choice of darkening the corners of the image to emphasize a central subject or lightening edges for more even illumination across the frame.
Finally, colour shading correction allows each corner of the frame to be colour corrected to combat any shift in colour between the centre and edges of the frame. Corrections can be made to red/cyan colour shading and blue/yellow colour shading from -9 to +9 relative to the green channel.
The X-Pro1 M Mount adapter will be available in June with an MSRP of $200.