The M Mount Adapter is a precision-made mount adapter that allows M Mount lenses from other manufacturers to be used with X Series cameras. Electronic contacts allow communication between the adapter and a camera body, and a programmable function button can be assigned to commands like Shoot Without Lens and focal length settings.*
X Series camera bodies have four pre-set focal lengths (21mm, 24mm, 28mm, and 35mm) and can store two more custom values. For each of these focal lengths, users can define three image correction parameters: distortion, peripheral illumination, and color shading.
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* Requires firmware update.