NiSi announced the NiSi 15mm f/4 earlier this year. They have since announced that it will be available in silver. NiSi 15mm f/4: B&H Photo / Adorama Related posts: New NiSi 15mm f/4 Announced Tokina 23mm f/1.4 and 33mm f/1.4 X-Mount Reviews Kipon EF-FX AF and EF-GFX AF Autofocus Adapters Firmware Updates