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According to trusted sources, including the trusted Japanese source, Fujifilm will launch a XF50mmF2 lens.
As always, when it comes to upcoming lenses, take it with a grain of salt. Even officially announced Fuji lenses can change specs later on (see the XF120mm, which will become an XF80mm lens, or the XF56mmF1.2, which originally was planed as F.1.4 lens)
XF 35mmF2 (save $100): BHphoto / AmazonUS / FocusCamera / Adorama – OUT OF STOCK – Order Now and be High On Waiting List
XF 16mm (save $300): BHphoto / AmazonUS / Adorama
XF 14mm (save $400): BHphoto / AmazonUS / FocusCamera / Adorama / Pictureline