A manual lens must be focused manually. Think again! The Fotodiox Pro PRONTO adapter brings autofocus to your Leica M-mount lenses. If you want to auto-focus your M-mount lenses on your sony E-mount camera, simply attach them to the PRONTO adapter. For general use, it is recommended to set the lens to infinity focus to allow autofocus within the entire focus range of the lens. Press the shutter button halfway to activate AF and the PRONTO adapter will focus your lens like any other AF lens. Performance is optimal with 50mm and wider lenses. Telephoto lenses require coarse manual focusing before using the adapter for fine-tuning autofocus. The button on the side of the Pronto is an assignable Fn button, just like the L-Fn button on native Z-mount lenses! This function button also allows the.
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