Conclusion
I’d love to say the Zeiss Touit 12mm f/2.8 should be purchased for your Fuji without question, but I can’t. As the pronunciation of the lens family implies, Zeiss would like you to just run out and do it today. I wouldn’t.
I’d put the Fuji 14mm f/2.8 ahead of this particular lens. It’s less expensive and doesn’t have an aperture control ring that spins whenever the wind changes direction. On top of that, the Fuji 14mm sports a very useful depth of field scale and, despite being lighter, actually feels denser and less toy-like then the Zeiss.
Out of the box I really, really wanted to love this lens. I love ultra wides, putting the 12mm right up my alley. Maybe if the price was $900 to $1,000, I could see past the minor flaws.
But at $1,250, with the issues it has — most annoyingly is the aperture control ring — I can’t see to it to plunk down that much cash. For the Sony, where the aperture ring is a non-issue, I suspect it’s the same game: not sharp wide open, feels toy like and is a little too pricey for most when many other options are available.
At this point for the Zeiss, I’m paying an extra few hundred bucks for a lens with blue logo, no depth of field scale and a wonky aperture ring.