See my Leica SL wishlist at B&H Photo.
This aperture series at 58mm is an excellent field confirmation of the autofocus and focus shift study at 49mm.
Aperture Series @ 58mm: Boulders Amid Rushing Water in Pescadero Creek
Includes images from f/3.7 through f/11, with up to full-resolution images (24 megapixels).
Boulders Amid Rushing Water in Pescadero Creek
f3.7 @ 1/20 sec, ISO 100; 2015-12-25 15:34:06[low-res image for bot]
LEICA SL (Typ 601) + VARIO-ELMARIT 1:2.8-4.0/24-90mm ASPH. OIS @ 58mm